Patch #914575: difflib side by side diff support, diff.py s/b/s HTML option.

Doc/lib/libdifflib.tex

@@ -52,6 +52,79 @@
   characters.
 \end{classdesc*}
 
+\begin{classdesc*}{HtmlDiff}
+
+  This class can be used to create an HTML table (or a complete HTML file
+  containing the table) showing a side by side, line by line comparision
+  of text with inter-line and intra-line change highlights.  The table can 
+  be generated in either full or contextual difference mode.
+
+  The constructor for this class is:
+
+  \begin{funcdesc}{__init__}{
+    \optional{, tabsize
+    \optional{, wrapcolumn
+    \optional{, linejunk
+    \optional{, charjunk}}}}}
+
+    Initializes instance of \class{HtmlDiff}.  
+
+    \var{tabsize} is an optional keyword argument to specify tab stop spacing 
+    and defaults to \code{8}.
+
+    \var{wrapcolumn} is an optional keyword to specify column number where 
+    lines are broken and wrapped, defaults to \code{None} where lines are not 
+    wrapped.
+
+    \var{linejunk} and \var{charjunk} are optional keyword arguments passed 
+    into \code{ndiff()} (used to by \class{HtmlDiff} to generate the 
+    side by side HTML differences).  See \code{ndiff()} documentation for 
+    argument default values and descriptions.
+  \end{funcdesc}  
+
+  The following methods are public:
+
+  \begin{funcdesc}{make_file}{fromlines, tolines
+    \optional{, fromdesc
+    \optional{, todesc
+    \optional{, context
+    \optional{, numlines}}}}}
+    Compares \var{fromlines} and \var{tolines} (lists of strings) and returns
+    a string which is a complete HTML file containing a table showing line by
+    line differences with inter-line and intra-line changes highlighted.
+    
+    \var{fromdesc} and \var{todesc} are optional keyword arguments to specify 
+    from/to file column header strings (both default to an empty string).  
+    
+    \var{context} and \var{numlines} are both optional keyword arguments.
+    Set \var{context} to \code{True} when contextual differences are to be 
+    shown, else the default is \code{False} to show the full files.  
+    \var{numlines} defaults to \code{5}.  When \var{context} is \code{True}
+    \var{numlines} controls the number of context lines which surround the 
+    difference highlights.  When \var{context} is \code{False} \var{numlines}
+    controls the number of lines which are shown before a difference 
+    highlight when using the "next" hyperlinks (setting to zero would cause
+    the "next" hyperlinks to place the next difference highlight at the top of
+    the browser without any leading context).
+  \end{funcdesc}  
+
+  \begin{funcdesc}{make_table}{fromlines, tolines
+    \optional{, fromdesc
+    \optional{, todesc
+    \optional{, context}}}}
+    Compares \var{fromlines} and \var{tolines} (lists of strings) and returns
+    a string which is a complete HTML table showing line by line differences
+    with inter-line and intra-line changes highlighted.
+    
+    The arguments of this method are a subset of those for the 
+    \code{make_file} method.  Refer to the \code{make_file} method 
+    documentation.
+  \end{funcdesc}  
+
+  \file{Tools/scripts/ndiff.py} is a command-line front-end to this class
+  and contains a good example of its use.
+\end{classdesc*}
+
 \begin{funcdesc}{context_diff}{a, b\optional{, fromfile\optional{, tofile
 	\optional{, fromfiledate\optional{, tofiledate\optional{, n
 	\optional{, lineterm}}}}}}}

Lib/difflib.py

@@ -23,11 +23,14 @@ Class SequenceMatcher:
 
 Class Differ:
     For producing human-readable deltas from sequences of lines of text.
+
+Class HtmlDiff:
+    For producing HTML side by side comparison with change highlights.
 """
 
 __all__ = ['get_close_matches', 'ndiff', 'restore', 'SequenceMatcher',
            'Differ','IS_CHARACTER_JUNK', 'IS_LINE_JUNK', 'context_diff',
-           'unified_diff']
+           'unified_diff', 'HtmlDiff']
 
 import heapq
 
@@ -1101,8 +1104,6 @@ def IS_CHARACTER_JUNK(ch, ws=" \t"):
 
     return ch in ws
 
-del re
-
 
 def unified_diff(a, b, fromfile='', tofile='', fromfiledate='',
                  tofiledate='', n=3, lineterm='\n'):
@@ -1277,6 +1278,678 @@ def ndiff(a, b, linejunk=None, charjunk=IS_CHARACTER_JUNK):
     """
     return Differ(linejunk, charjunk).compare(a, b)
 
+def _mdiff(fromlines, tolines, context=None, linejunk=None,
+           charjunk=IS_CHARACTER_JUNK):
+    """Returns generator yielding marked up from/to side by side differences.
+
+    Arguments:
+    fromlines -- list of text lines to compared to tolines
+    tolines -- list of text lines to be compared to fromlines
+    context -- number of context lines to display on each side of difference,
+               if None, all from/to text lines will be generated.
+    linejunk -- passed on to ndiff (see ndiff documentation)
+    charjunk -- passed on to ndiff (see ndiff documentation)
+    
+    This function returns an interator which returns a tuple:
+    (from line tuple, to line tuple, boolean flag)
+
+    from/to line tuple -- (line num, line text)
+        line num -- integer or None (to indicate a context seperation)
+        line text -- original line text with following markers inserted:
+            '\0+' -- marks start of added text
+            '\0-' -- marks start of deleted text
+            '\0^' -- marks start of changed text
+            '\1' -- marks end of added/deleted/changed text
+        
+    boolean flag -- None indicates context separation, True indicates
+        either "from" or "to" line contains a change, otherwise False.
+
+    This function/iterator was originally developed to generate side by side
+    file difference for making HTML pages (see HtmlDiff class for example
+    usage).
+
+    Note, this function utilizes the ndiff function to generate the side by
+    side difference markup.  Optional ndiff arguments may be passed to this
+    function and they in turn will be passed to ndiff.    
+    """
+    import re 
+
+    # regular expression for finding intraline change indices
+    change_re = re.compile('(\++|\-+|\^+)')
+    
+    # create the difference iterator to generate the differences
+    diff_lines_iterator = ndiff(fromlines,tolines,linejunk,charjunk)
+
+    def _make_line(lines, format_key, side, num_lines=[0,0]):
+        """Returns line of text with user's change markup and line formatting.
+
+        lines -- list of lines from the ndiff generator to produce a line of
+                 text from.  When producing the line of text to return, the
+                 lines used are removed from this list.
+        format_key -- '+' return first line in list with "add" markup around
+                          the entire line.
+                      '-' return first line in list with "delete" markup around
+                          the entire line.
+                      '?' return first line in list with add/delete/change
+                          intraline markup (indices obtained from second line)
+                      None return first line in list with no markup
+        side -- indice into the num_lines list (0=from,1=to)
+        num_lines -- from/to current line number.  This is NOT intended to be a
+                     passed parameter.  It is present as a keyword argument to
+                     maintain memory of the current line numbers between calls
+                     of this function.
+
+        Note, this function is purposefully not defined at the module scope so
+        that data it needs from its parent function (within whose context it
+        is defined) does not need to be of module scope.
+        """
+        num_lines[side] += 1
+        # Handle case where no user markup is to be added, just return line of
+        # text with user's line format to allow for usage of the line number.
+        if format_key is None:
+            return (num_lines[side],lines.pop(0)[2:])
+        # Handle case of intraline changes
+        if format_key == '?':
+            text, markers = lines.pop(0), lines.pop(0)
+            # find intraline changes (store change type and indices in tuples)
+            sub_info = []
+            def record_sub_info(match_object,sub_info=sub_info):
+                sub_info.append([match_object.group(1)[0],match_object.span()])
+                return match_object.group(1)
+            change_re.sub(record_sub_info,markers)
+            # process each tuple inserting our special marks that won't be
+            # noticed by an xml/html escaper.
+            for key,(begin,end) in sub_info[::-1]:
+                text = text[0:begin]+'\0'+key+text[begin:end]+'\1'+text[end:]
+            text = text[2:]
+        # Handle case of add/delete entire line
+        else:
+            text = lines.pop(0)[2:]
+            # if line of text is just a newline, insert a space so there is
+            # something for the user to highlight and see.
+            if len(text) <= 1:
+                text = ' '+text
+            # insert marks that won't be noticed by an xml/html escaper.
+            text = '\0' + format_key + text + '\1'
+        # Return line of text, first allow user's line formatter to do it's
+        # thing (such as adding the line number) then replace the special
+        # marks with what the user's change markup.
+        return (num_lines[side],text)
+    
+    def _line_iterator():
+        """Yields from/to lines of text with a change indication.
+
+        This function is an iterator.  It itself pulls lines from a
+        differencing iterator, processes them and yields them.  When it can
+        it yields both a "from" and a "to" line, otherwise it will yield one
+        or the other.  In addition to yielding the lines of from/to text, a
+        boolean flag is yielded to indicate if the text line(s) have
+        differences in them.
+
+        Note, this function is purposefully not defined at the module scope so
+        that data it needs from its parent function (within whose context it
+        is defined) does not need to be of module scope.
+        """
+        lines = []
+        num_blanks_pending, num_blanks_to_yield = 0, 0
+        while True:        
+            # Load up next 4 lines so we can look ahead, create strings which
+            # are a concatenation of the first character of each of the 4 lines
+            # so we can do some very readable comparisons.
+            while len(lines) < 4:
+                try:
+                    lines.append(diff_lines_iterator.next())
+                except StopIteration:
+                    lines.append('X')
+            s = ''.join([line[0] for line in lines])
+            if s.startswith('X'):
+                # When no more lines, pump out any remaining blank lines so the
+                # corresponding add/delete lines get a matching blank line so
+                # all line pairs get yielded at the next level.
+                num_blanks_to_yield = num_blanks_pending
+            elif s.startswith('-?+?'):
+                # simple intraline change
+                yield _make_line(lines,'?',0), _make_line(lines,'?',1), True
+                continue
+            elif s.startswith('--++'):
+                # in delete block, add block coming: we do NOT want to get
+                # caught up on blank lines yet, just process the delete line
+                num_blanks_pending -= 1
+                yield _make_line(lines,'-',0), None, True
+                continue
+            elif s.startswith('--?+') or s.startswith('--+') or \
+                 s.startswith('- '):
+                # in delete block and see a intraline change or unchanged line
+                # coming: yield the delete line and then blanks
+                from_line,to_line = _make_line(lines,'-',0), None
+                num_blanks_to_yield,num_blanks_pending = num_blanks_pending-1,0
+            elif s.startswith('-+?'):
+                # intraline change
+                yield _make_line(lines,None,0), _make_line(lines,'?',1), True
+                continue
+            elif s.startswith('-?+'):
+                # intraline change
+                yield _make_line(lines,'?',0), _make_line(lines,None,1), True
+                continue
+            elif s.startswith('-'):
+                # delete FROM line
+                num_blanks_pending -= 1
+                yield _make_line(lines,'-',0), None, True
+                continue
+            elif s.startswith('+--'):
+                # in add block, delete block coming: we do NOT want to get
+                # caught up on blank lines yet, just process the add line
+                num_blanks_pending += 1
+                yield None, _make_line(lines,'+',1), True
+                continue
+            elif s.startswith('+ ') or s.startswith('+-'):
+                # will be leaving an add block: yield blanks then add line
+                from_line, to_line = None, _make_line(lines,'+',1)
+                num_blanks_to_yield,num_blanks_pending = num_blanks_pending+1,0
+            elif s.startswith('+'):
+                # inside an add block, yield the add line
+                num_blanks_pending += 1
+                yield None, _make_line(lines,'+',1), True
+                continue
+            elif s.startswith(' '):
+                # unchanged text, yield it to both sides
+                yield _make_line(lines[:],None,0),_make_line(lines,None,1),False
+                continue
+            # Catch up on the blank lines so when we yield the next from/to
+            # pair, they are lined up.
+            while(num_blanks_to_yield < 0):
+                num_blanks_to_yield += 1
+                yield None,('','\n'),True
+            while(num_blanks_to_yield > 0):
+                num_blanks_to_yield -= 1
+                yield ('','\n'),None,True
+            if s.startswith('X'):
+                raise StopIteration
+            else:
+                yield from_line,to_line,True
+
+    def _line_pair_iterator():
+        """Yields from/to lines of text with a change indication.
+
+        This function is an iterator.  It itself pulls lines from the line
+        iterator.  It's difference from that iterator is that this function
+        always yields a pair of from/to text lines (with the change
+        indication).  If necessary it will collect single from/to lines
+        until it has a matching pair from/to pair to yield.
+
+        Note, this function is purposefully not defined at the module scope so
+        that data it needs from its parent function (within whose context it
+        is defined) does not need to be of module scope.
+        """
+        line_iterator = _line_iterator()
+        fromlines,tolines=[],[]
+        while True:
+            # Collecting lines of text until we have a from/to pair
+            while (len(fromlines)==0 or len(tolines)==0):
+                from_line, to_line, found_diff =line_iterator.next()
+                if from_line is not None:
+                    fromlines.append((from_line,found_diff))
+                if to_line is not None:
+                    tolines.append((to_line,found_diff))
+            # Once we have a pair, remove them from the collection and yield it
+            from_line, fromDiff = fromlines.pop(0)
+            to_line, to_diff = tolines.pop(0)
+            yield (from_line,to_line,fromDiff or to_diff)
+
+    # Handle case where user does not want context differencing, just yield
+    # them up without doing anything else with them.
+    line_pair_iterator = _line_pair_iterator()
+    if context is None:
+        while True:
+            yield line_pair_iterator.next()
+    # Handle case where user wants context differencing.  We must do some
+    # storage of lines until we know for sure that they are to be yielded.
+    else:
+        context += 1
+        lines_to_write = 0
+        while True:
+            # Store lines up until we find a difference, note use of a
+            # circular queue because we only need to keep around what
+            # we need for context.
+            index, contextLines = 0, [None]*(context)
+            found_diff = False
+            while(found_diff is False):
+                from_line, to_line, found_diff = line_pair_iterator.next()
+                i = index % context
+                contextLines[i] = (from_line, to_line, found_diff)
+                index += 1
+            # Yield lines that we have collected so far, but first yield
+            # the user's separator.
+            if index > context:
+                yield None, None, None
+                lines_to_write = context
+            else:
+                lines_to_write = index
+                index = 0
+            while(lines_to_write):
+                i = index % context
+                index += 1
+                yield contextLines[i]
+                lines_to_write -= 1
+            # Now yield the context lines after the change
+            lines_to_write = context-1
+            while(lines_to_write):
+                from_line, to_line, found_diff = line_pair_iterator.next()
+                # If another change within the context, extend the context
+                if found_diff:
+                    lines_to_write = context-1
+                else:
+                    lines_to_write -= 1
+                yield from_line, to_line, found_diff
+
+
+_file_template = """
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+          "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+
+<html>
+
+<head>
+    <meta http-equiv="Content-Type" 
+          content="text/html; charset=ISO-8859-1" />
+    <title></title>
+    <style type="text/css">%(styles)s
+    </style>
+</head>
+
+<body>
+    %(table)s%(legend)s
+</body>
+
+</html>"""
+
+_styles = """
+        table.diff {font-family:Courier; border:medium;}
+        .diff_header {background-color:#e0e0e0}
+        td.diff_header {text-align:right}
+        .diff_next {background-color:#c0c0c0}
+        .diff_add {background-color:#aaffaa}
+        .diff_chg {background-color:#ffff77}
+        .diff_sub {background-color:#ffaaaa}"""
+
+_table_template = """
+    <table class="diff" id="difflib_chg_%(prefix)s_top"  
+           cellspacing="0" cellpadding="0" rules="groups" > 
+        <colgroup></colgroup> <colgroup></colgroup> <colgroup></colgroup> 
+        <colgroup></colgroup> <colgroup></colgroup> <colgroup></colgroup>
+        %(header_row)s
+        <tbody>
+%(data_rows)s        </tbody>
+    </table>"""
+
+_legend = """
+    <table class="diff" summary="Legends">
+        <tr> <th colspan="2"> Legends </th> </tr>
+        <tr> <td> <table border="" summary="Colors">
+                      <tr><th> Colors </th> </tr>
+                      <tr><td class="diff_add">&nbsp;Added&nbsp;</td></tr>
+                      <tr><td class="diff_chg">Changed</td> </tr>
+                      <tr><td class="diff_sub">Deleted</td> </tr>
+                  </table></td>
+             <td> <table border="" summary="Links">
+                      <tr><th colspan="2"> Links </th> </tr>
+                      <tr><td>(f)irst change</td> </tr>
+                      <tr><td>(n)ext change</td> </tr>
+                      <tr><td>(t)op</td> </tr>
+                  </table></td> </tr>
+    </table>"""
+
+class HtmlDiff(object):
+    """For producing HTML side by side comparison with change highlights.
+
+    This class can be used to create an HTML table (or a complete HTML file
+    containing the table) showing a side by side, line by line comparision
+    of text with inter-line and intra-line change highlights.  The table can 
+    be generated in either full or contextual difference mode.
+    
+    The following methods are provided for HTML generation:
+
+    make_table -- generates HTML for a single side by side table
+    make_file -- generates complete HTML file with a single side by side table
+
+    See tools/scripts/diff.py for an example usage of this class.    
+    """
+
+    _file_template = _file_template
+    _styles = _styles
+    _table_template = _table_template
+    _legend = _legend
+    _default_prefix = 0
+    
+    def __init__(self,tabsize=8,wrapcolumn=None,linejunk=None,
+                 charjunk=IS_CHARACTER_JUNK):
+        """HtmlDiff instance initializer
+
+        Arguments:
+        tabsize -- tab stop spacing, defaults to 8.
+        wrapcolumn -- column number where lines are broken and wrapped,
+            defaults to None where lines are not wrapped.
+        linejunk,charjunk -- keyword arguments passed into ndiff() (used to by
+            HtmlDiff() to generate the side by side HTML differences).  See 
+            ndiff() documentation for argument default values and descriptions.
+        """
+        self._tabsize = tabsize
+        self._wrapcolumn = wrapcolumn
+        self._linejunk = linejunk
+        self._charjunk = charjunk
+
+    def make_file(self,fromlines,tolines,fromdesc='',todesc='',context=False,
+                  numlines=5):
+        """Returns HTML file of side by side comparison with change highlights
+
+        Arguments:
+        fromlines -- list of "from" lines
+        tolines -- list of "to" lines
+        fromdesc -- "from" file column header string
+        todesc -- "to" file column header string
+        context -- set to True for contextual differences (defaults to False
+            which shows full differences).
+        numlines -- number of context lines.  When context is set True,
+            controls number of lines displayed before and after the change.
+            When context is False, controls the number of lines to place
+            the "next" link anchors before the next change (so click of
+            "next" link jumps to just before the change).
+        """
+                
+        return self._file_template % dict(
+            styles = self._styles,
+            legend = self._legend,
+            table = self.make_table(fromlines,tolines,fromdesc,todesc,
+                                    context=context,numlines=numlines))
+    
+    def _tab_newline_replace(self,fromlines,tolines):
+        """Returns from/to line lists with tabs expanded and newlines removed.
+
+        Instead of tab characters being replaced by the number of spaces
+        needed to fill in to the next tab stop, this function will fill
+        the space with tab characters.  This is done so that the difference
+        algorithms can identify changes in a file when tabs are replaced by
+        spaces and vice versa.  At the end of the HTML generation, the tab
+        characters will be replaced with a nonbreakable space.
+        """
+        def expand_tabs(line):
+            # hide real spaces
+            line = line.replace(' ','\0')
+            # expand tabs into spaces
+            line = line.expandtabs(self._tabsize)
+            # relace spaces from expanded tabs back into tab characters
+            # (we'll replace them with markup after we do differencing)
+            line = line.replace(' ','\t')
+            return line.replace('\0',' ').rstrip('\n')
+        fromlines = [expand_tabs(line) for line in fromlines]
+        tolines = [expand_tabs(line) for line in tolines]
+        return fromlines,tolines
+
+    def _split_line(self,data_list,line_num,text):
+        """Builds list of text lines by splitting text lines at wrap point
+
+        This function will determine if the input text line needs to be
+        wrapped (split) into separate lines.  If so, the first wrap point
+        will be determined and the first line appended to the output
+        text line list.  This function is used recursively to handle
+        the second part of the split line to further split it.
+        """
+        # if blank line or context separator, just add it to the output list
+        if not line_num:
+            data_list.append((line_num,text))
+            return
+
+        # if line text doesn't need wrapping, just add it to the output list
+        size = len(text)
+        max = self._wrapcolumn
+        if (size <= max) or ((size -(text.count('\0')*3)) <= max):
+            data_list.append((line_num,text))
+            return
+
+        # scan text looking for the wrap point, keeping track if the wrap
+        # point is inside markers
+        i = 0
+        n = 0
+        mark = ''
+        while n < max and i < size:
+            if text[i] == '\0':
+                i += 1
+                mark = text[i]
+                i += 1
+            elif text[i] == '\1':
+                i += 1
+                mark = ''
+            else:
+                i += 1
+                n += 1
+
+        # wrap point is inside text, break it up into separate lines
+        line1 = text[:i]
+        line2 = text[i:]
+
+        # if wrap point is inside markers, place end marker at end of first
+        # line and start marker at beginning of second line because each
+        # line will have its own table tag markup around it.
+        if mark:
+            line1 = line1 + '\1'
+            line2 = '\0' + mark + line2
+
+        # tack on first line onto the output list            
+        data_list.append((line_num,line1))
+
+        # use this routine again to wrap the remaining text        
+        self._split_line(data_list,'>',line2)
+
+    def _line_wrapper(self,diffs):
+        """Returns iterator that splits (wraps) mdiff text lines"""
+
+        # pull from/to data and flags from mdiff iterator
+        for fromdata,todata,flag in diffs:
+            # check for context separators and pass them through
+            if flag is None:
+                yield fromdata,todata,flag
+                continue
+            (fromline,fromtext),(toline,totext) = fromdata,todata
+            # for each from/to line split it at the wrap column to form
+            # list of text lines.
+            fromlist,tolist = [],[]
+            self._split_line(fromlist,fromline,fromtext)
+            self._split_line(tolist,toline,totext)
+            # yield from/to line in pairs inserting blank lines as
+            # necessary when one side has more wrapped lines
+            while fromlist or tolist:
+                if fromlist:
+                    fromdata = fromlist.pop(0)
+                else:
+                    fromdata = ('',' ')
+                if tolist:
+                    todata = tolist.pop(0)
+                else:
+                    todata = ('',' ')
+                yield fromdata,todata,flag
+
+    def _collect_lines(self,diffs):
+        """Collects mdiff output into separate lists
+
+        Before storing the mdiff from/to data into a list, it is converted
+        into a single line of text with HTML markup.
+        """
+
+        fromlist,tolist,flaglist = [],[],[]
+        # pull from/to data and flags from mdiff style iterator        
+        for fromdata,todata,flag in diffs:
+            try:
+                # store HTML markup of the lines into the lists
+                fromlist.append(self._format_line(0,flag,*fromdata))
+                tolist.append(self._format_line(1,flag,*todata))
+            except TypeError:
+                # exceptions occur for lines where context separators go
+                fromlist.append(None)
+                tolist.append(None)
+            flaglist.append(flag)
+        return fromlist,tolist,flaglist
+    
+    def _format_line(self,side,flag,linenum,text):
+        """Returns HTML markup of "from" / "to" text lines
+
+        side -- 0 or 1 indicating "from" or "to" text
+        flag -- indicates if difference on line
+        linenum -- line number (used for line number column)
+        text -- line text to be marked up
+        """
+        try:
+            linenum = '%d' % linenum
+            id = ' id="%s%s"' % (self._prefix[side],linenum)
+        except TypeError:
+            # handle blank lines where linenum is '>' or ''
+            id = '' 
+        # replace those things that would get confused with HTML symbols
+        text=text.replace("&","&amp;").replace(">","&gt;").replace("<","&lt;")
+
+        # make space non-breakable so they don't get compressed or line wrapped
+        text = text.replace(' ','&nbsp;').rstrip()
+
+        return '<td class="diff_header"%s>%s</td><td nowrap="nowrap">%s</td>' \
+               % (id,linenum,text)
+
+    def _make_prefix(self):
+        """Create unique anchor prefixes"""
+
+        # Generate a unique anchor prefix so multiple tables
+        # can exist on the same HTML page without conflicts.
+        fromprefix = "from%d_" % HtmlDiff._default_prefix
+        toprefix = "to%d_" % HtmlDiff._default_prefix
+        HtmlDiff._default_prefix += 1
+        # store prefixes so line format method has access
+        self._prefix = [fromprefix,toprefix]
+
+    def _convert_flags(self,fromlist,tolist,flaglist,context,numlines):
+        """Makes list of "next" links"""
+        
+        # all anchor names will be generated using the unique "to" prefix
+        toprefix = self._prefix[1]
+        
+        # process change flags, generating middle column of next anchors/links
+        next_id = ['']*len(flaglist)
+        next_href = ['']*len(flaglist)
+        num_chg, in_change = 0, False
+        last = 0
+        for i,flag in enumerate(flaglist):
+            if flag:
+                if not in_change:
+                    in_change = True
+                    last = i
+                    # at the beginning of a change, drop an anchor a few lines
+                    # (the context lines) before the change for the previous 
+                    # link
+                    i = max([0,i-numlines])
+                    next_id[i] = ' id="difflib_chg_%s_%d"' % (toprefix,num_chg)
+                    # at the beginning of a change, drop a link to the next 
+                    # change
+                    num_chg += 1
+                    next_href[last] = '<a href="#difflib_chg_%s_%d">n</a>' % (
+                         toprefix,num_chg)
+            else:
+                in_change = False
+        # check for cases where there is no content to avoid exceptions
+        if not flaglist:
+            flaglist = [False]
+            next_id = ['']
+            next_href = ['']
+            last = 0
+            if context:
+                fromlist = ['<td></td><td>&nbsp;No Differences Found&nbsp;</td>']
+                tolist = fromlist
+            else:
+                fromlist = tolist = ['<td></td><td>&nbsp;Empty File&nbsp;</td>']
+        # if not a change on first line, drop a link
+        if not flaglist[0]:
+            next_href[0] = '<a href="#difflib_chg_%s_0">f</a>' % toprefix
+        # redo the last link to link to the top
+        next_href[last] = '<a href="#difflib_chg_%s_top">t</a>' % (toprefix)
+
+        return fromlist,tolist,flaglist,next_href,next_id
+
+    def make_table(self,fromlines,tolines,fromdesc='',todesc='',context=False,
+                   numlines=5):
+        """Returns HTML table of side by side comparison with change highlights
+
+        Arguments:
+        fromlines -- list of "from" lines
+        tolines -- list of "to" lines
+        fromdesc -- "from" file column header string
+        todesc -- "to" file column header string
+        context -- set to True for contextual differences (defaults to False
+            which shows full differences).
+        numlines -- number of context lines.  When context is set True,
+            controls number of lines displayed before and after the change.
+            When context is False, controls the number of lines to place
+            the "next" link anchors before the next change (so click of
+            "next" link jumps to just before the change).
+        """
+
+        # make unique anchor prefixes so that multiple tables may exist
+        # on the same page without conflict.
+        self._make_prefix()
+        
+        # change tabs to spaces before it gets more difficult after we insert
+        # markkup
+        fromlines,tolines = self._tab_newline_replace(fromlines,tolines)
+            
+        # create diffs iterator which generates side by side from/to data
+        if context:
+            context_lines = numlines
+        else:
+            context_lines = None
+        diffs = _mdiff(fromlines,tolines,context_lines,linejunk=self._linejunk,
+                      charjunk=self._charjunk)
+
+        # set up iterator to wrap lines that exceed desired width
+        if self._wrapcolumn:
+            diffs = self._line_wrapper(diffs)
+            
+        # collect up from/to lines and flags into lists (also format the lines)
+        fromlist,tolist,flaglist = self._collect_lines(diffs)
+
+        # process change flags, generating middle column of next anchors/links
+        fromlist,tolist,flaglist,next_href,next_id = self._convert_flags(
+            fromlist,tolist,flaglist,context,numlines)
+
+        import cStringIO
+        s = cStringIO.StringIO()
+        fmt = '            <tr><td class="diff_next"%s>%s</td>%s' + \
+              '<td class="diff_next">%s</td>%s</tr>\n'
+        for i in range(len(flaglist)):
+            if flaglist[i] is None:
+                # mdiff yields None on separator lines skip the bogus ones
+                # generated for the first line
+                if i > 0:
+                    s.write('        </tbody>        \n        <tbody>\n')
+            else:
+                s.write( fmt % (next_id[i],next_href[i],fromlist[i],
+                                           next_href[i],tolist[i]))
+        if fromdesc or todesc:
+            header_row = '<thead><tr>%s%s%s%s</tr></thead>' % (
+                '<th class="diff_next"><br /></th>',
+                '<th colspan="2" class="diff_header">%s</th>' % fromdesc,
+                '<th class="diff_next"><br /></th>',
+                '<th colspan="2" class="diff_header">%s</th>' % todesc)
+        else:
+            header_row = ''
+
+        table = self._table_template % dict(
+            data_rows=s.getvalue(),
+            header_row=header_row,
+            prefix=self._prefix[1])
+
+        return table.replace('\0+','<span class="diff_add">'). \
+                     replace('\0-','<span class="diff_sub">'). \
+                     replace('\0^','<span class="diff_chg">'). \
+                     replace('\1','</span>'). \
+                     replace('\t','&nbsp;')
+            
+del re
+
 def restore(delta, which):
     r"""
     Generate one of the two sequences that generated a delta.

Lib/test/test_difflib.py

@@ -1,5 +1,5 @@
 import difflib
-from test import test_support
+from test.test_support import run_unittest, findfile
 import unittest
 import doctest
 
@@ -19,6 +19,130 @@ class TestSFbugs(unittest.TestCase):
         diff_gen = difflib.unified_diff([], [])
         self.assertRaises(StopIteration, diff_gen.next)
 
+patch914575_from1 = """
+   1. Beautiful is beTTer than ugly.
+   2. Explicit is better than implicit.
+   3. Simple is better than complex.
+   4. Complex is better than complicated.
+"""
+
+patch914575_to1 = """
+   1. Beautiful is better than ugly.
+   3.   Simple is better than complex.
+   4. Complicated is better than complex.
+   5. Flat is better than nested.
+"""
+
+patch914575_from2 = """
+\t\tLine 1: preceeded by from:[tt] to:[ssss]
+  \t\tLine 2: preceeded by from:[sstt] to:[sssst]
+  \t \tLine 3: preceeded by from:[sstst] to:[ssssss]
+Line 4:  \thas from:[sst] to:[sss] after :
+Line 5: has from:[t] to:[ss] at end\t
+"""
+
+patch914575_to2 = """
+    Line 1: preceeded by from:[tt] to:[ssss]
+    \tLine 2: preceeded by from:[sstt] to:[sssst]
+      Line 3: preceeded by from:[sstst] to:[ssssss]
+Line 4:   has from:[sst] to:[sss] after :
+Line 5: has from:[t] to:[ss] at end  
+"""
+
+patch914575_from3 = """line 0
+1234567890123456789012345689012345
+line 1
+line 2
+line 3
+line 4   changed 
+line 5   changed 
+line 6   changed 
+line 7
+line 8  subtracted
+line 9
+1234567890123456789012345689012345
+short line
+just fits in!!
+just fits in two lines yup!!
+the end"""
+
+patch914575_to3 = """line 0
+1234567890123456789012345689012345
+line 1
+line 2    added
+line 3
+line 4   chanGEd 
+line 5a  chanGed 
+line 6a  changEd 
+line 7
+line 8
+line 9
+1234567890
+another long line that needs to be wrapped
+just fitS in!!
+just fits in two lineS yup!!
+the end"""
+
+class TestSFpatches(unittest.TestCase):
+
+    def test_html_diff(self):
+        # Check SF patch 914575 for generating HTML differences
+        f1a = ((patch914575_from1 + '123\n'*10)*3)
+        t1a = (patch914575_to1 + '123\n'*10)*3
+        f1b = '456\n'*10 + f1a
+        t1b = '456\n'*10 + t1a
+        f1a = f1a.splitlines()
+        t1a = t1a.splitlines()
+        f1b = f1b.splitlines()
+        t1b = t1b.splitlines()
+        f2 = patch914575_from2.splitlines()
+        t2 = patch914575_to2.splitlines()
+        f3 = patch914575_from3
+        t3 = patch914575_to3
+        i = difflib.HtmlDiff()
+        j = difflib.HtmlDiff(tabsize=2)
+        k = difflib.HtmlDiff(wrapcolumn=14)
+        
+        full = i.make_file(f1a,t1a,'from','to',context=False,numlines=5)
+        tables = '\n'.join(
+            [
+             '<h2>Context (first diff within numlines=5(default))</h2>', 
+             i.make_table(f1a,t1a,'from','to',context=True),
+             '<h2>Context (first diff after numlines=5(default))</h2>', 
+             i.make_table(f1b,t1b,'from','to',context=True),
+             '<h2>Context (numlines=6)</h2>', 
+             i.make_table(f1a,t1a,'from','to',context=True,numlines=6),
+             '<h2>Context (numlines=0)</h2>', 
+             i.make_table(f1a,t1a,'from','to',context=True,numlines=0),
+             '<h2>Same Context</h2>', 
+             i.make_table(f1a,f1a,'from','to',context=True),
+             '<h2>Same Full</h2>', 
+             i.make_table(f1a,f1a,'from','to',context=False),
+             '<h2>Empty Context</h2>',
+             i.make_table([],[],'from','to',context=True),
+             '<h2>Empty Full</h2>',
+             i.make_table([],[],'from','to',context=False),
+             '<h2>tabsize=2</h2>',
+             j.make_table(f2,t2),
+             '<h2>tabsize=default</h2>',
+             i.make_table(f2,t2),
+             '<h2>Context (wrapcolumn=14,numlines=0)</h2>',
+             k.make_table(f3.splitlines(),t3.splitlines(),context=True,numlines=0),
+             '<h2>wrapcolumn=14,splitlines()</h2>',
+             k.make_table(f3.splitlines(),t3.splitlines()),
+             '<h2>wrapcolumn=14,splitlines(True)</h2>',
+             k.make_table(f3.splitlines(True),t3.splitlines(True)),
+             ])
+        actual = full.replace('</body>','\n%s\n</body>' % tables)
+        # temporarily uncomment next three lines to baseline this test
+        #f = open('test_difflib_expect.html','w')
+        #f.write(actual)
+        #f.close()
+        expect = open(findfile('test_difflib_expect.html')).read()
+        
+                          
+        self.assertEqual(actual,expect)
+
 Doctests = doctest.DocTestSuite(difflib)
 
-test_support.run_unittest(TestSFbugs, Doctests)
+run_unittest(TestSFpatches, TestSFbugs, Doctests)

Lib/test/test_difflib_expect.html

@@ -0,0 +1,526 @@
+
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+          "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+
+<html>
+
+<head>
+    <meta http-equiv="Content-Type" 
+          content="text/html; charset=ISO-8859-1" />
+    <title></title>
+    <style type="text/css">
+        table.diff {font-family:Courier; border:medium;}
+        .diff_header {background-color:#e0e0e0}
+        td.diff_header {text-align:right}
+        .diff_next {background-color:#c0c0c0}
+        .diff_add {background-color:#aaffaa}
+        .diff_chg {background-color:#ffff77}
+        .diff_sub {background-color:#ffaaaa}
+    </style>
+</head>
+
+<body>
+    
+    <table class="diff" id="difflib_chg_to0__top"  
+           cellspacing="0" cellpadding="0" rules="groups" > 
+        <colgroup></colgroup> <colgroup></colgroup> <colgroup></colgroup> 
+        <colgroup></colgroup> <colgroup></colgroup> <colgroup></colgroup>
+        <thead><tr><th class="diff_next"><br /></th><th colspan="2" class="diff_header">from</th><th class="diff_next"><br /></th><th colspan="2" class="diff_header">to</th></tr></thead>
+        <tbody>
+            <tr><td class="diff_next" id="difflib_chg_to0__0"><a href="#difflib_chg_to0__0">f</a></td><td class="diff_header" id="from0_1">1</td><td nowrap="nowrap"></td><td class="diff_next"><a href="#difflib_chg_to0__0">f</a></td><td class="diff_header" id="to0_1">1</td><td nowrap="nowrap"></td></tr>
+            <tr><td class="diff_next"><a href="#difflib_chg_to0__1">n</a></td><td class="diff_header" id="from0_2">2</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;1.&nbsp;Beautiful&nbsp;is&nbsp;be<span class="diff_chg">TT</span>er&nbsp;than&nbsp;ugly.</td><td class="diff_next"><a href="#difflib_chg_to0__1">n</a></td><td class="diff_header" id="to0_2">2</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;1.&nbsp;Beautiful&nbsp;is&nbsp;be<span class="diff_chg">tt</span>er&nbsp;than&nbsp;ugly.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from0_3">3</td><td nowrap="nowrap"><span class="diff_sub">&nbsp;&nbsp;&nbsp;2.&nbsp;Explicit&nbsp;is&nbsp;better&nbsp;than&nbsp;implicit.</span></td><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap"></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from0_4">4</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;3.&nbsp;Simple&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</td><td class="diff_next"></td><td class="diff_header" id="to0_3">3</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;3.<span class="diff_add">&nbsp;&nbsp;</span>&nbsp;Simple&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from0_5">5</td><td nowrap="nowrap"><span class="diff_sub">&nbsp;&nbsp;&nbsp;4.&nbsp;Complex&nbsp;is&nbsp;better&nbsp;than&nbsp;complicated.</span></td><td class="diff_next"></td><td class="diff_header" id="to0_4">4</td><td nowrap="nowrap"><span class="diff_add">&nbsp;&nbsp;&nbsp;4.&nbsp;Complicated&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap"></td><td class="diff_next"></td><td class="diff_header" id="to0_5">5</td><td nowrap="nowrap"><span class="diff_add">&nbsp;&nbsp;&nbsp;5.&nbsp;Flat&nbsp;is&nbsp;better&nbsp;than&nbsp;nested.</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from0_6">6</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to0_6">6</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from0_7">7</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to0_7">7</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from0_8">8</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to0_8">8</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from0_9">9</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to0_9">9</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from0_10">10</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to0_10">10</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from0_11">11</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to0_11">11</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next" id="difflib_chg_to0__1"></td><td class="diff_header" id="from0_12">12</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to0_12">12</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from0_13">13</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to0_13">13</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from0_14">14</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to0_14">14</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from0_15">15</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to0_15">15</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from0_16">16</td><td nowrap="nowrap"></td><td class="diff_next"></td><td class="diff_header" id="to0_16">16</td><td nowrap="nowrap"></td></tr>
+            <tr><td class="diff_next"><a href="#difflib_chg_to0__2">n</a></td><td class="diff_header" id="from0_17">17</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;1.&nbsp;Beautiful&nbsp;is&nbsp;be<span class="diff_chg">TT</span>er&nbsp;than&nbsp;ugly.</td><td class="diff_next"><a href="#difflib_chg_to0__2">n</a></td><td class="diff_header" id="to0_17">17</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;1.&nbsp;Beautiful&nbsp;is&nbsp;be<span class="diff_chg">tt</span>er&nbsp;than&nbsp;ugly.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from0_18">18</td><td nowrap="nowrap"><span class="diff_sub">&nbsp;&nbsp;&nbsp;2.&nbsp;Explicit&nbsp;is&nbsp;better&nbsp;than&nbsp;implicit.</span></td><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap"></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from0_19">19</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;3.&nbsp;Simple&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</td><td class="diff_next"></td><td class="diff_header" id="to0_18">18</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;3.<span class="diff_add">&nbsp;&nbsp;</span>&nbsp;Simple&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from0_20">20</td><td nowrap="nowrap"><span class="diff_sub">&nbsp;&nbsp;&nbsp;4.&nbsp;Complex&nbsp;is&nbsp;better&nbsp;than&nbsp;complicated.</span></td><td class="diff_next"></td><td class="diff_header" id="to0_19">19</td><td nowrap="nowrap"><span class="diff_add">&nbsp;&nbsp;&nbsp;4.&nbsp;Complicated&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap"></td><td class="diff_next"></td><td class="diff_header" id="to0_20">20</td><td nowrap="nowrap"><span class="diff_add">&nbsp;&nbsp;&nbsp;5.&nbsp;Flat&nbsp;is&nbsp;better&nbsp;than&nbsp;nested.</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from0_21">21</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to0_21">21</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from0_22">22</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to0_22">22</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from0_23">23</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to0_23">23</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from0_24">24</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to0_24">24</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from0_25">25</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to0_25">25</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from0_26">26</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to0_26">26</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next" id="difflib_chg_to0__2"></td><td class="diff_header" id="from0_27">27</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to0_27">27</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from0_28">28</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to0_28">28</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from0_29">29</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to0_29">29</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from0_30">30</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to0_30">30</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from0_31">31</td><td nowrap="nowrap"></td><td class="diff_next"></td><td class="diff_header" id="to0_31">31</td><td nowrap="nowrap"></td></tr>
+            <tr><td class="diff_next"><a href="#difflib_chg_to0__top">t</a></td><td class="diff_header" id="from0_32">32</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;1.&nbsp;Beautiful&nbsp;is&nbsp;be<span class="diff_chg">TT</span>er&nbsp;than&nbsp;ugly.</td><td class="diff_next"><a href="#difflib_chg_to0__top">t</a></td><td class="diff_header" id="to0_32">32</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;1.&nbsp;Beautiful&nbsp;is&nbsp;be<span class="diff_chg">tt</span>er&nbsp;than&nbsp;ugly.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from0_33">33</td><td nowrap="nowrap"><span class="diff_sub">&nbsp;&nbsp;&nbsp;2.&nbsp;Explicit&nbsp;is&nbsp;better&nbsp;than&nbsp;implicit.</span></td><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap"></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from0_34">34</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;3.&nbsp;Simple&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</td><td class="diff_next"></td><td class="diff_header" id="to0_33">33</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;3.<span class="diff_add">&nbsp;&nbsp;</span>&nbsp;Simple&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from0_35">35</td><td nowrap="nowrap"><span class="diff_sub">&nbsp;&nbsp;&nbsp;4.&nbsp;Complex&nbsp;is&nbsp;better&nbsp;than&nbsp;complicated.</span></td><td class="diff_next"></td><td class="diff_header" id="to0_34">34</td><td nowrap="nowrap"><span class="diff_add">&nbsp;&nbsp;&nbsp;4.&nbsp;Complicated&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap"></td><td class="diff_next"></td><td class="diff_header" id="to0_35">35</td><td nowrap="nowrap"><span class="diff_add">&nbsp;&nbsp;&nbsp;5.&nbsp;Flat&nbsp;is&nbsp;better&nbsp;than&nbsp;nested.</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from0_36">36</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to0_36">36</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from0_37">37</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to0_37">37</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from0_38">38</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to0_38">38</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from0_39">39</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to0_39">39</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from0_40">40</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to0_40">40</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from0_41">41</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to0_41">41</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from0_42">42</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to0_42">42</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from0_43">43</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to0_43">43</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from0_44">44</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to0_44">44</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from0_45">45</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to0_45">45</td><td nowrap="nowrap">123</td></tr>
+        </tbody>
+    </table>
+    <table class="diff" summary="Legends">
+        <tr> <th colspan="2"> Legends </th> </tr>
+        <tr> <td> <table border="" summary="Colors">
+                      <tr><th> Colors </th> </tr>
+                      <tr><td class="diff_add">&nbsp;Added&nbsp;</td></tr>
+                      <tr><td class="diff_chg">Changed</td> </tr>
+                      <tr><td class="diff_sub">Deleted</td> </tr>
+                  </table></td>
+             <td> <table border="" summary="Links">
+                      <tr><th colspan="2"> Links </th> </tr>
+                      <tr><td>(f)irst change</td> </tr>
+                      <tr><td>(n)ext change</td> </tr>
+                      <tr><td>(t)op</td> </tr>
+                  </table></td> </tr>
+    </table>
+
+<h2>Context (first diff within numlines=5(default))</h2>
+
+    <table class="diff" id="difflib_chg_to1__top"  
+           cellspacing="0" cellpadding="0" rules="groups" > 
+        <colgroup></colgroup> <colgroup></colgroup> <colgroup></colgroup> 
+        <colgroup></colgroup> <colgroup></colgroup> <colgroup></colgroup>
+        <thead><tr><th class="diff_next"><br /></th><th colspan="2" class="diff_header">from</th><th class="diff_next"><br /></th><th colspan="2" class="diff_header">to</th></tr></thead>
+        <tbody>
+            <tr><td class="diff_next" id="difflib_chg_to1__0"><a href="#difflib_chg_to1__0">f</a></td><td class="diff_header" id="from1_1">1</td><td nowrap="nowrap"></td><td class="diff_next"><a href="#difflib_chg_to1__0">f</a></td><td class="diff_header" id="to1_1">1</td><td nowrap="nowrap"></td></tr>
+            <tr><td class="diff_next"><a href="#difflib_chg_to1__1">n</a></td><td class="diff_header" id="from1_2">2</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;1.&nbsp;Beautiful&nbsp;is&nbsp;be<span class="diff_chg">TT</span>er&nbsp;than&nbsp;ugly.</td><td class="diff_next"><a href="#difflib_chg_to1__1">n</a></td><td class="diff_header" id="to1_2">2</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;1.&nbsp;Beautiful&nbsp;is&nbsp;be<span class="diff_chg">tt</span>er&nbsp;than&nbsp;ugly.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from1_3">3</td><td nowrap="nowrap"><span class="diff_sub">&nbsp;&nbsp;&nbsp;2.&nbsp;Explicit&nbsp;is&nbsp;better&nbsp;than&nbsp;implicit.</span></td><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap"></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from1_4">4</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;3.&nbsp;Simple&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</td><td class="diff_next"></td><td class="diff_header" id="to1_3">3</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;3.<span class="diff_add">&nbsp;&nbsp;</span>&nbsp;Simple&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from1_5">5</td><td nowrap="nowrap"><span class="diff_sub">&nbsp;&nbsp;&nbsp;4.&nbsp;Complex&nbsp;is&nbsp;better&nbsp;than&nbsp;complicated.</span></td><td class="diff_next"></td><td class="diff_header" id="to1_4">4</td><td nowrap="nowrap"><span class="diff_add">&nbsp;&nbsp;&nbsp;4.&nbsp;Complicated&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap"></td><td class="diff_next"></td><td class="diff_header" id="to1_5">5</td><td nowrap="nowrap"><span class="diff_add">&nbsp;&nbsp;&nbsp;5.&nbsp;Flat&nbsp;is&nbsp;better&nbsp;than&nbsp;nested.</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from1_6">6</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to1_6">6</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from1_7">7</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to1_7">7</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from1_8">8</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to1_8">8</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from1_9">9</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to1_9">9</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from1_10">10</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to1_10">10</td><td nowrap="nowrap">123</td></tr>
+        </tbody>        
+        <tbody>
+            <tr><td class="diff_next" id="difflib_chg_to1__1"></td><td class="diff_header" id="from1_12">12</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to1_12">12</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from1_13">13</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to1_13">13</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from1_14">14</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to1_14">14</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from1_15">15</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to1_15">15</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from1_16">16</td><td nowrap="nowrap"></td><td class="diff_next"></td><td class="diff_header" id="to1_16">16</td><td nowrap="nowrap"></td></tr>
+            <tr><td class="diff_next"><a href="#difflib_chg_to1__2">n</a></td><td class="diff_header" id="from1_17">17</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;1.&nbsp;Beautiful&nbsp;is&nbsp;be<span class="diff_chg">TT</span>er&nbsp;than&nbsp;ugly.</td><td class="diff_next"><a href="#difflib_chg_to1__2">n</a></td><td class="diff_header" id="to1_17">17</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;1.&nbsp;Beautiful&nbsp;is&nbsp;be<span class="diff_chg">tt</span>er&nbsp;than&nbsp;ugly.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from1_18">18</td><td nowrap="nowrap"><span class="diff_sub">&nbsp;&nbsp;&nbsp;2.&nbsp;Explicit&nbsp;is&nbsp;better&nbsp;than&nbsp;implicit.</span></td><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap"></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from1_19">19</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;3.&nbsp;Simple&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</td><td class="diff_next"></td><td class="diff_header" id="to1_18">18</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;3.<span class="diff_add">&nbsp;&nbsp;</span>&nbsp;Simple&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from1_20">20</td><td nowrap="nowrap"><span class="diff_sub">&nbsp;&nbsp;&nbsp;4.&nbsp;Complex&nbsp;is&nbsp;better&nbsp;than&nbsp;complicated.</span></td><td class="diff_next"></td><td class="diff_header" id="to1_19">19</td><td nowrap="nowrap"><span class="diff_add">&nbsp;&nbsp;&nbsp;4.&nbsp;Complicated&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap"></td><td class="diff_next"></td><td class="diff_header" id="to1_20">20</td><td nowrap="nowrap"><span class="diff_add">&nbsp;&nbsp;&nbsp;5.&nbsp;Flat&nbsp;is&nbsp;better&nbsp;than&nbsp;nested.</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from1_21">21</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to1_21">21</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from1_22">22</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to1_22">22</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from1_23">23</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to1_23">23</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from1_24">24</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to1_24">24</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from1_25">25</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to1_25">25</td><td nowrap="nowrap">123</td></tr>
+        </tbody>        
+        <tbody>
+            <tr><td class="diff_next" id="difflib_chg_to1__2"></td><td class="diff_header" id="from1_27">27</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to1_27">27</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from1_28">28</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to1_28">28</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from1_29">29</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to1_29">29</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from1_30">30</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to1_30">30</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from1_31">31</td><td nowrap="nowrap"></td><td class="diff_next"></td><td class="diff_header" id="to1_31">31</td><td nowrap="nowrap"></td></tr>
+            <tr><td class="diff_next"><a href="#difflib_chg_to1__top">t</a></td><td class="diff_header" id="from1_32">32</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;1.&nbsp;Beautiful&nbsp;is&nbsp;be<span class="diff_chg">TT</span>er&nbsp;than&nbsp;ugly.</td><td class="diff_next"><a href="#difflib_chg_to1__top">t</a></td><td class="diff_header" id="to1_32">32</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;1.&nbsp;Beautiful&nbsp;is&nbsp;be<span class="diff_chg">tt</span>er&nbsp;than&nbsp;ugly.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from1_33">33</td><td nowrap="nowrap"><span class="diff_sub">&nbsp;&nbsp;&nbsp;2.&nbsp;Explicit&nbsp;is&nbsp;better&nbsp;than&nbsp;implicit.</span></td><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap"></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from1_34">34</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;3.&nbsp;Simple&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</td><td class="diff_next"></td><td class="diff_header" id="to1_33">33</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;3.<span class="diff_add">&nbsp;&nbsp;</span>&nbsp;Simple&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from1_35">35</td><td nowrap="nowrap"><span class="diff_sub">&nbsp;&nbsp;&nbsp;4.&nbsp;Complex&nbsp;is&nbsp;better&nbsp;than&nbsp;complicated.</span></td><td class="diff_next"></td><td class="diff_header" id="to1_34">34</td><td nowrap="nowrap"><span class="diff_add">&nbsp;&nbsp;&nbsp;4.&nbsp;Complicated&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap"></td><td class="diff_next"></td><td class="diff_header" id="to1_35">35</td><td nowrap="nowrap"><span class="diff_add">&nbsp;&nbsp;&nbsp;5.&nbsp;Flat&nbsp;is&nbsp;better&nbsp;than&nbsp;nested.</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from1_36">36</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to1_36">36</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from1_37">37</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to1_37">37</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from1_38">38</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to1_38">38</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from1_39">39</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to1_39">39</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from1_40">40</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to1_40">40</td><td nowrap="nowrap">123</td></tr>
+        </tbody>
+    </table>
+<h2>Context (first diff after numlines=5(default))</h2>
+
+    <table class="diff" id="difflib_chg_to2__top"  
+           cellspacing="0" cellpadding="0" rules="groups" > 
+        <colgroup></colgroup> <colgroup></colgroup> <colgroup></colgroup> 
+        <colgroup></colgroup> <colgroup></colgroup> <colgroup></colgroup>
+        <thead><tr><th class="diff_next"><br /></th><th colspan="2" class="diff_header">from</th><th class="diff_next"><br /></th><th colspan="2" class="diff_header">to</th></tr></thead>
+        <tbody>
+            <tr><td class="diff_next" id="difflib_chg_to2__0"></td><td class="diff_header" id="from2_7">7</td><td nowrap="nowrap">456</td><td class="diff_next"></td><td class="diff_header" id="to2_7">7</td><td nowrap="nowrap">456</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from2_8">8</td><td nowrap="nowrap">456</td><td class="diff_next"></td><td class="diff_header" id="to2_8">8</td><td nowrap="nowrap">456</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from2_9">9</td><td nowrap="nowrap">456</td><td class="diff_next"></td><td class="diff_header" id="to2_9">9</td><td nowrap="nowrap">456</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from2_10">10</td><td nowrap="nowrap">456</td><td class="diff_next"></td><td class="diff_header" id="to2_10">10</td><td nowrap="nowrap">456</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from2_11">11</td><td nowrap="nowrap"></td><td class="diff_next"></td><td class="diff_header" id="to2_11">11</td><td nowrap="nowrap"></td></tr>
+            <tr><td class="diff_next"><a href="#difflib_chg_to2__1">n</a></td><td class="diff_header" id="from2_12">12</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;1.&nbsp;Beautiful&nbsp;is&nbsp;be<span class="diff_chg">TT</span>er&nbsp;than&nbsp;ugly.</td><td class="diff_next"><a href="#difflib_chg_to2__1">n</a></td><td class="diff_header" id="to2_12">12</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;1.&nbsp;Beautiful&nbsp;is&nbsp;be<span class="diff_chg">tt</span>er&nbsp;than&nbsp;ugly.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from2_13">13</td><td nowrap="nowrap"><span class="diff_sub">&nbsp;&nbsp;&nbsp;2.&nbsp;Explicit&nbsp;is&nbsp;better&nbsp;than&nbsp;implicit.</span></td><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap"></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from2_14">14</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;3.&nbsp;Simple&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</td><td class="diff_next"></td><td class="diff_header" id="to2_13">13</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;3.<span class="diff_add">&nbsp;&nbsp;</span>&nbsp;Simple&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from2_15">15</td><td nowrap="nowrap"><span class="diff_sub">&nbsp;&nbsp;&nbsp;4.&nbsp;Complex&nbsp;is&nbsp;better&nbsp;than&nbsp;complicated.</span></td><td class="diff_next"></td><td class="diff_header" id="to2_14">14</td><td nowrap="nowrap"><span class="diff_add">&nbsp;&nbsp;&nbsp;4.&nbsp;Complicated&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap"></td><td class="diff_next"></td><td class="diff_header" id="to2_15">15</td><td nowrap="nowrap"><span class="diff_add">&nbsp;&nbsp;&nbsp;5.&nbsp;Flat&nbsp;is&nbsp;better&nbsp;than&nbsp;nested.</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from2_16">16</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to2_16">16</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from2_17">17</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to2_17">17</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from2_18">18</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to2_18">18</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from2_19">19</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to2_19">19</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from2_20">20</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to2_20">20</td><td nowrap="nowrap">123</td></tr>
+        </tbody>        
+        <tbody>
+            <tr><td class="diff_next" id="difflib_chg_to2__1"></td><td class="diff_header" id="from2_22">22</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to2_22">22</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from2_23">23</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to2_23">23</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from2_24">24</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to2_24">24</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from2_25">25</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to2_25">25</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from2_26">26</td><td nowrap="nowrap"></td><td class="diff_next"></td><td class="diff_header" id="to2_26">26</td><td nowrap="nowrap"></td></tr>
+            <tr><td class="diff_next"><a href="#difflib_chg_to2__2">n</a></td><td class="diff_header" id="from2_27">27</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;1.&nbsp;Beautiful&nbsp;is&nbsp;be<span class="diff_chg">TT</span>er&nbsp;than&nbsp;ugly.</td><td class="diff_next"><a href="#difflib_chg_to2__2">n</a></td><td class="diff_header" id="to2_27">27</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;1.&nbsp;Beautiful&nbsp;is&nbsp;be<span class="diff_chg">tt</span>er&nbsp;than&nbsp;ugly.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from2_28">28</td><td nowrap="nowrap"><span class="diff_sub">&nbsp;&nbsp;&nbsp;2.&nbsp;Explicit&nbsp;is&nbsp;better&nbsp;than&nbsp;implicit.</span></td><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap"></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from2_29">29</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;3.&nbsp;Simple&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</td><td class="diff_next"></td><td class="diff_header" id="to2_28">28</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;3.<span class="diff_add">&nbsp;&nbsp;</span>&nbsp;Simple&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from2_30">30</td><td nowrap="nowrap"><span class="diff_sub">&nbsp;&nbsp;&nbsp;4.&nbsp;Complex&nbsp;is&nbsp;better&nbsp;than&nbsp;complicated.</span></td><td class="diff_next"></td><td class="diff_header" id="to2_29">29</td><td nowrap="nowrap"><span class="diff_add">&nbsp;&nbsp;&nbsp;4.&nbsp;Complicated&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap"></td><td class="diff_next"></td><td class="diff_header" id="to2_30">30</td><td nowrap="nowrap"><span class="diff_add">&nbsp;&nbsp;&nbsp;5.&nbsp;Flat&nbsp;is&nbsp;better&nbsp;than&nbsp;nested.</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from2_31">31</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to2_31">31</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from2_32">32</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to2_32">32</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from2_33">33</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to2_33">33</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from2_34">34</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to2_34">34</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from2_35">35</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to2_35">35</td><td nowrap="nowrap">123</td></tr>
+        </tbody>        
+        <tbody>
+            <tr><td class="diff_next" id="difflib_chg_to2__2"></td><td class="diff_header" id="from2_37">37</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to2_37">37</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from2_38">38</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to2_38">38</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from2_39">39</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to2_39">39</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from2_40">40</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to2_40">40</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from2_41">41</td><td nowrap="nowrap"></td><td class="diff_next"></td><td class="diff_header" id="to2_41">41</td><td nowrap="nowrap"></td></tr>
+            <tr><td class="diff_next"><a href="#difflib_chg_to2__top">t</a></td><td class="diff_header" id="from2_42">42</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;1.&nbsp;Beautiful&nbsp;is&nbsp;be<span class="diff_chg">TT</span>er&nbsp;than&nbsp;ugly.</td><td class="diff_next"><a href="#difflib_chg_to2__top">t</a></td><td class="diff_header" id="to2_42">42</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;1.&nbsp;Beautiful&nbsp;is&nbsp;be<span class="diff_chg">tt</span>er&nbsp;than&nbsp;ugly.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from2_43">43</td><td nowrap="nowrap"><span class="diff_sub">&nbsp;&nbsp;&nbsp;2.&nbsp;Explicit&nbsp;is&nbsp;better&nbsp;than&nbsp;implicit.</span></td><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap"></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from2_44">44</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;3.&nbsp;Simple&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</td><td class="diff_next"></td><td class="diff_header" id="to2_43">43</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;3.<span class="diff_add">&nbsp;&nbsp;</span>&nbsp;Simple&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from2_45">45</td><td nowrap="nowrap"><span class="diff_sub">&nbsp;&nbsp;&nbsp;4.&nbsp;Complex&nbsp;is&nbsp;better&nbsp;than&nbsp;complicated.</span></td><td class="diff_next"></td><td class="diff_header" id="to2_44">44</td><td nowrap="nowrap"><span class="diff_add">&nbsp;&nbsp;&nbsp;4.&nbsp;Complicated&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap"></td><td class="diff_next"></td><td class="diff_header" id="to2_45">45</td><td nowrap="nowrap"><span class="diff_add">&nbsp;&nbsp;&nbsp;5.&nbsp;Flat&nbsp;is&nbsp;better&nbsp;than&nbsp;nested.</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from2_46">46</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to2_46">46</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from2_47">47</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to2_47">47</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from2_48">48</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to2_48">48</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from2_49">49</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to2_49">49</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from2_50">50</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to2_50">50</td><td nowrap="nowrap">123</td></tr>
+        </tbody>
+    </table>
+<h2>Context (numlines=6)</h2>
+
+    <table class="diff" id="difflib_chg_to3__top"  
+           cellspacing="0" cellpadding="0" rules="groups" > 
+        <colgroup></colgroup> <colgroup></colgroup> <colgroup></colgroup> 
+        <colgroup></colgroup> <colgroup></colgroup> <colgroup></colgroup>
+        <thead><tr><th class="diff_next"><br /></th><th colspan="2" class="diff_header">from</th><th class="diff_next"><br /></th><th colspan="2" class="diff_header">to</th></tr></thead>
+        <tbody>
+            <tr><td class="diff_next" id="difflib_chg_to3__0"><a href="#difflib_chg_to3__0">f</a></td><td class="diff_header" id="from3_1">1</td><td nowrap="nowrap"></td><td class="diff_next"><a href="#difflib_chg_to3__0">f</a></td><td class="diff_header" id="to3_1">1</td><td nowrap="nowrap"></td></tr>
+            <tr><td class="diff_next"><a href="#difflib_chg_to3__1">n</a></td><td class="diff_header" id="from3_2">2</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;1.&nbsp;Beautiful&nbsp;is&nbsp;be<span class="diff_chg">TT</span>er&nbsp;than&nbsp;ugly.</td><td class="diff_next"><a href="#difflib_chg_to3__1">n</a></td><td class="diff_header" id="to3_2">2</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;1.&nbsp;Beautiful&nbsp;is&nbsp;be<span class="diff_chg">tt</span>er&nbsp;than&nbsp;ugly.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from3_3">3</td><td nowrap="nowrap"><span class="diff_sub">&nbsp;&nbsp;&nbsp;2.&nbsp;Explicit&nbsp;is&nbsp;better&nbsp;than&nbsp;implicit.</span></td><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap"></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from3_4">4</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;3.&nbsp;Simple&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</td><td class="diff_next"></td><td class="diff_header" id="to3_3">3</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;3.<span class="diff_add">&nbsp;&nbsp;</span>&nbsp;Simple&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from3_5">5</td><td nowrap="nowrap"><span class="diff_sub">&nbsp;&nbsp;&nbsp;4.&nbsp;Complex&nbsp;is&nbsp;better&nbsp;than&nbsp;complicated.</span></td><td class="diff_next"></td><td class="diff_header" id="to3_4">4</td><td nowrap="nowrap"><span class="diff_add">&nbsp;&nbsp;&nbsp;4.&nbsp;Complicated&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap"></td><td class="diff_next"></td><td class="diff_header" id="to3_5">5</td><td nowrap="nowrap"><span class="diff_add">&nbsp;&nbsp;&nbsp;5.&nbsp;Flat&nbsp;is&nbsp;better&nbsp;than&nbsp;nested.</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from3_6">6</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to3_6">6</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from3_7">7</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to3_7">7</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from3_8">8</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to3_8">8</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from3_9">9</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to3_9">9</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from3_10">10</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to3_10">10</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next" id="difflib_chg_to3__1"></td><td class="diff_header" id="from3_11">11</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to3_11">11</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from3_12">12</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to3_12">12</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from3_13">13</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to3_13">13</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from3_14">14</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to3_14">14</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from3_15">15</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to3_15">15</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from3_16">16</td><td nowrap="nowrap"></td><td class="diff_next"></td><td class="diff_header" id="to3_16">16</td><td nowrap="nowrap"></td></tr>
+            <tr><td class="diff_next"><a href="#difflib_chg_to3__2">n</a></td><td class="diff_header" id="from3_17">17</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;1.&nbsp;Beautiful&nbsp;is&nbsp;be<span class="diff_chg">TT</span>er&nbsp;than&nbsp;ugly.</td><td class="diff_next"><a href="#difflib_chg_to3__2">n</a></td><td class="diff_header" id="to3_17">17</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;1.&nbsp;Beautiful&nbsp;is&nbsp;be<span class="diff_chg">tt</span>er&nbsp;than&nbsp;ugly.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from3_18">18</td><td nowrap="nowrap"><span class="diff_sub">&nbsp;&nbsp;&nbsp;2.&nbsp;Explicit&nbsp;is&nbsp;better&nbsp;than&nbsp;implicit.</span></td><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap"></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from3_19">19</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;3.&nbsp;Simple&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</td><td class="diff_next"></td><td class="diff_header" id="to3_18">18</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;3.<span class="diff_add">&nbsp;&nbsp;</span>&nbsp;Simple&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from3_20">20</td><td nowrap="nowrap"><span class="diff_sub">&nbsp;&nbsp;&nbsp;4.&nbsp;Complex&nbsp;is&nbsp;better&nbsp;than&nbsp;complicated.</span></td><td class="diff_next"></td><td class="diff_header" id="to3_19">19</td><td nowrap="nowrap"><span class="diff_add">&nbsp;&nbsp;&nbsp;4.&nbsp;Complicated&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap"></td><td class="diff_next"></td><td class="diff_header" id="to3_20">20</td><td nowrap="nowrap"><span class="diff_add">&nbsp;&nbsp;&nbsp;5.&nbsp;Flat&nbsp;is&nbsp;better&nbsp;than&nbsp;nested.</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from3_21">21</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to3_21">21</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from3_22">22</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to3_22">22</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from3_23">23</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to3_23">23</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from3_24">24</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to3_24">24</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from3_25">25</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to3_25">25</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next" id="difflib_chg_to3__2"></td><td class="diff_header" id="from3_26">26</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to3_26">26</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from3_27">27</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to3_27">27</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from3_28">28</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to3_28">28</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from3_29">29</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to3_29">29</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from3_30">30</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to3_30">30</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from3_31">31</td><td nowrap="nowrap"></td><td class="diff_next"></td><td class="diff_header" id="to3_31">31</td><td nowrap="nowrap"></td></tr>
+            <tr><td class="diff_next"><a href="#difflib_chg_to3__top">t</a></td><td class="diff_header" id="from3_32">32</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;1.&nbsp;Beautiful&nbsp;is&nbsp;be<span class="diff_chg">TT</span>er&nbsp;than&nbsp;ugly.</td><td class="diff_next"><a href="#difflib_chg_to3__top">t</a></td><td class="diff_header" id="to3_32">32</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;1.&nbsp;Beautiful&nbsp;is&nbsp;be<span class="diff_chg">tt</span>er&nbsp;than&nbsp;ugly.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from3_33">33</td><td nowrap="nowrap"><span class="diff_sub">&nbsp;&nbsp;&nbsp;2.&nbsp;Explicit&nbsp;is&nbsp;better&nbsp;than&nbsp;implicit.</span></td><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap"></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from3_34">34</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;3.&nbsp;Simple&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</td><td class="diff_next"></td><td class="diff_header" id="to3_33">33</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;3.<span class="diff_add">&nbsp;&nbsp;</span>&nbsp;Simple&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from3_35">35</td><td nowrap="nowrap"><span class="diff_sub">&nbsp;&nbsp;&nbsp;4.&nbsp;Complex&nbsp;is&nbsp;better&nbsp;than&nbsp;complicated.</span></td><td class="diff_next"></td><td class="diff_header" id="to3_34">34</td><td nowrap="nowrap"><span class="diff_add">&nbsp;&nbsp;&nbsp;4.&nbsp;Complicated&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap"></td><td class="diff_next"></td><td class="diff_header" id="to3_35">35</td><td nowrap="nowrap"><span class="diff_add">&nbsp;&nbsp;&nbsp;5.&nbsp;Flat&nbsp;is&nbsp;better&nbsp;than&nbsp;nested.</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from3_36">36</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to3_36">36</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from3_37">37</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to3_37">37</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from3_38">38</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to3_38">38</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from3_39">39</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to3_39">39</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from3_40">40</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to3_40">40</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from3_41">41</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to3_41">41</td><td nowrap="nowrap">123</td></tr>
+        </tbody>
+    </table>
+<h2>Context (numlines=0)</h2>
+
+    <table class="diff" id="difflib_chg_to4__top"  
+           cellspacing="0" cellpadding="0" rules="groups" > 
+        <colgroup></colgroup> <colgroup></colgroup> <colgroup></colgroup> 
+        <colgroup></colgroup> <colgroup></colgroup> <colgroup></colgroup>
+        <thead><tr><th class="diff_next"><br /></th><th colspan="2" class="diff_header">from</th><th class="diff_next"><br /></th><th colspan="2" class="diff_header">to</th></tr></thead>
+        <tbody>
+            <tr><td class="diff_next" id="difflib_chg_to4__0"><a href="#difflib_chg_to4__1">n</a></td><td class="diff_header" id="from4_2">2</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;1.&nbsp;Beautiful&nbsp;is&nbsp;be<span class="diff_chg">TT</span>er&nbsp;than&nbsp;ugly.</td><td class="diff_next"><a href="#difflib_chg_to4__1">n</a></td><td class="diff_header" id="to4_2">2</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;1.&nbsp;Beautiful&nbsp;is&nbsp;be<span class="diff_chg">tt</span>er&nbsp;than&nbsp;ugly.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from4_3">3</td><td nowrap="nowrap"><span class="diff_sub">&nbsp;&nbsp;&nbsp;2.&nbsp;Explicit&nbsp;is&nbsp;better&nbsp;than&nbsp;implicit.</span></td><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap"></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from4_4">4</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;3.&nbsp;Simple&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</td><td class="diff_next"></td><td class="diff_header" id="to4_3">3</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;3.<span class="diff_add">&nbsp;&nbsp;</span>&nbsp;Simple&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from4_5">5</td><td nowrap="nowrap"><span class="diff_sub">&nbsp;&nbsp;&nbsp;4.&nbsp;Complex&nbsp;is&nbsp;better&nbsp;than&nbsp;complicated.</span></td><td class="diff_next"></td><td class="diff_header" id="to4_4">4</td><td nowrap="nowrap"><span class="diff_add">&nbsp;&nbsp;&nbsp;4.&nbsp;Complicated&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap"></td><td class="diff_next"></td><td class="diff_header" id="to4_5">5</td><td nowrap="nowrap"><span class="diff_add">&nbsp;&nbsp;&nbsp;5.&nbsp;Flat&nbsp;is&nbsp;better&nbsp;than&nbsp;nested.</span></td></tr>
+        </tbody>        
+        <tbody>
+            <tr><td class="diff_next" id="difflib_chg_to4__1"><a href="#difflib_chg_to4__2">n</a></td><td class="diff_header" id="from4_17">17</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;1.&nbsp;Beautiful&nbsp;is&nbsp;be<span class="diff_chg">TT</span>er&nbsp;than&nbsp;ugly.</td><td class="diff_next"><a href="#difflib_chg_to4__2">n</a></td><td class="diff_header" id="to4_17">17</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;1.&nbsp;Beautiful&nbsp;is&nbsp;be<span class="diff_chg">tt</span>er&nbsp;than&nbsp;ugly.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from4_18">18</td><td nowrap="nowrap"><span class="diff_sub">&nbsp;&nbsp;&nbsp;2.&nbsp;Explicit&nbsp;is&nbsp;better&nbsp;than&nbsp;implicit.</span></td><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap"></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from4_19">19</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;3.&nbsp;Simple&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</td><td class="diff_next"></td><td class="diff_header" id="to4_18">18</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;3.<span class="diff_add">&nbsp;&nbsp;</span>&nbsp;Simple&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from4_20">20</td><td nowrap="nowrap"><span class="diff_sub">&nbsp;&nbsp;&nbsp;4.&nbsp;Complex&nbsp;is&nbsp;better&nbsp;than&nbsp;complicated.</span></td><td class="diff_next"></td><td class="diff_header" id="to4_19">19</td><td nowrap="nowrap"><span class="diff_add">&nbsp;&nbsp;&nbsp;4.&nbsp;Complicated&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap"></td><td class="diff_next"></td><td class="diff_header" id="to4_20">20</td><td nowrap="nowrap"><span class="diff_add">&nbsp;&nbsp;&nbsp;5.&nbsp;Flat&nbsp;is&nbsp;better&nbsp;than&nbsp;nested.</span></td></tr>
+        </tbody>        
+        <tbody>
+            <tr><td class="diff_next" id="difflib_chg_to4__2"><a href="#difflib_chg_to4__top">t</a></td><td class="diff_header" id="from4_32">32</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;1.&nbsp;Beautiful&nbsp;is&nbsp;be<span class="diff_chg">TT</span>er&nbsp;than&nbsp;ugly.</td><td class="diff_next"><a href="#difflib_chg_to4__top">t</a></td><td class="diff_header" id="to4_32">32</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;1.&nbsp;Beautiful&nbsp;is&nbsp;be<span class="diff_chg">tt</span>er&nbsp;than&nbsp;ugly.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from4_33">33</td><td nowrap="nowrap"><span class="diff_sub">&nbsp;&nbsp;&nbsp;2.&nbsp;Explicit&nbsp;is&nbsp;better&nbsp;than&nbsp;implicit.</span></td><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap"></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from4_34">34</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;3.&nbsp;Simple&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</td><td class="diff_next"></td><td class="diff_header" id="to4_33">33</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;3.<span class="diff_add">&nbsp;&nbsp;</span>&nbsp;Simple&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from4_35">35</td><td nowrap="nowrap"><span class="diff_sub">&nbsp;&nbsp;&nbsp;4.&nbsp;Complex&nbsp;is&nbsp;better&nbsp;than&nbsp;complicated.</span></td><td class="diff_next"></td><td class="diff_header" id="to4_34">34</td><td nowrap="nowrap"><span class="diff_add">&nbsp;&nbsp;&nbsp;4.&nbsp;Complicated&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap"></td><td class="diff_next"></td><td class="diff_header" id="to4_35">35</td><td nowrap="nowrap"><span class="diff_add">&nbsp;&nbsp;&nbsp;5.&nbsp;Flat&nbsp;is&nbsp;better&nbsp;than&nbsp;nested.</span></td></tr>
+        </tbody>
+    </table>
+<h2>Same Context</h2>
+
+    <table class="diff" id="difflib_chg_to5__top"  
+           cellspacing="0" cellpadding="0" rules="groups" > 
+        <colgroup></colgroup> <colgroup></colgroup> <colgroup></colgroup> 
+        <colgroup></colgroup> <colgroup></colgroup> <colgroup></colgroup>
+        <thead><tr><th class="diff_next"><br /></th><th colspan="2" class="diff_header">from</th><th class="diff_next"><br /></th><th colspan="2" class="diff_header">to</th></tr></thead>
+        <tbody>
+            <tr><td class="diff_next"><a href="#difflib_chg_to5__top">t</a></td><td></td><td>&nbsp;No Differences Found&nbsp;</td><td class="diff_next"><a href="#difflib_chg_to5__top">t</a></td><td></td><td>&nbsp;No Differences Found&nbsp;</td></tr>
+        </tbody>
+    </table>
+<h2>Same Full</h2>
+
+    <table class="diff" id="difflib_chg_to6__top"  
+           cellspacing="0" cellpadding="0" rules="groups" > 
+        <colgroup></colgroup> <colgroup></colgroup> <colgroup></colgroup> 
+        <colgroup></colgroup> <colgroup></colgroup> <colgroup></colgroup>
+        <thead><tr><th class="diff_next"><br /></th><th colspan="2" class="diff_header">from</th><th class="diff_next"><br /></th><th colspan="2" class="diff_header">to</th></tr></thead>
+        <tbody>
+            <tr><td class="diff_next"><a href="#difflib_chg_to6__top">t</a></td><td class="diff_header" id="from6_1">1</td><td nowrap="nowrap"></td><td class="diff_next"><a href="#difflib_chg_to6__top">t</a></td><td class="diff_header" id="to6_1">1</td><td nowrap="nowrap"></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_2">2</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;1.&nbsp;Beautiful&nbsp;is&nbsp;beTTer&nbsp;than&nbsp;ugly.</td><td class="diff_next"></td><td class="diff_header" id="to6_2">2</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;1.&nbsp;Beautiful&nbsp;is&nbsp;beTTer&nbsp;than&nbsp;ugly.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_3">3</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;2.&nbsp;Explicit&nbsp;is&nbsp;better&nbsp;than&nbsp;implicit.</td><td class="diff_next"></td><td class="diff_header" id="to6_3">3</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;2.&nbsp;Explicit&nbsp;is&nbsp;better&nbsp;than&nbsp;implicit.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_4">4</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;3.&nbsp;Simple&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</td><td class="diff_next"></td><td class="diff_header" id="to6_4">4</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;3.&nbsp;Simple&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_5">5</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;4.&nbsp;Complex&nbsp;is&nbsp;better&nbsp;than&nbsp;complicated.</td><td class="diff_next"></td><td class="diff_header" id="to6_5">5</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;4.&nbsp;Complex&nbsp;is&nbsp;better&nbsp;than&nbsp;complicated.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_6">6</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to6_6">6</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_7">7</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to6_7">7</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_8">8</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to6_8">8</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_9">9</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to6_9">9</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_10">10</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to6_10">10</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_11">11</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to6_11">11</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_12">12</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to6_12">12</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_13">13</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to6_13">13</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_14">14</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to6_14">14</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_15">15</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to6_15">15</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_16">16</td><td nowrap="nowrap"></td><td class="diff_next"></td><td class="diff_header" id="to6_16">16</td><td nowrap="nowrap"></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_17">17</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;1.&nbsp;Beautiful&nbsp;is&nbsp;beTTer&nbsp;than&nbsp;ugly.</td><td class="diff_next"></td><td class="diff_header" id="to6_17">17</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;1.&nbsp;Beautiful&nbsp;is&nbsp;beTTer&nbsp;than&nbsp;ugly.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_18">18</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;2.&nbsp;Explicit&nbsp;is&nbsp;better&nbsp;than&nbsp;implicit.</td><td class="diff_next"></td><td class="diff_header" id="to6_18">18</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;2.&nbsp;Explicit&nbsp;is&nbsp;better&nbsp;than&nbsp;implicit.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_19">19</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;3.&nbsp;Simple&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</td><td class="diff_next"></td><td class="diff_header" id="to6_19">19</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;3.&nbsp;Simple&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_20">20</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;4.&nbsp;Complex&nbsp;is&nbsp;better&nbsp;than&nbsp;complicated.</td><td class="diff_next"></td><td class="diff_header" id="to6_20">20</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;4.&nbsp;Complex&nbsp;is&nbsp;better&nbsp;than&nbsp;complicated.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_21">21</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to6_21">21</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_22">22</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to6_22">22</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_23">23</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to6_23">23</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_24">24</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to6_24">24</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_25">25</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to6_25">25</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_26">26</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to6_26">26</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_27">27</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to6_27">27</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_28">28</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to6_28">28</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_29">29</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to6_29">29</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_30">30</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to6_30">30</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_31">31</td><td nowrap="nowrap"></td><td class="diff_next"></td><td class="diff_header" id="to6_31">31</td><td nowrap="nowrap"></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_32">32</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;1.&nbsp;Beautiful&nbsp;is&nbsp;beTTer&nbsp;than&nbsp;ugly.</td><td class="diff_next"></td><td class="diff_header" id="to6_32">32</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;1.&nbsp;Beautiful&nbsp;is&nbsp;beTTer&nbsp;than&nbsp;ugly.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_33">33</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;2.&nbsp;Explicit&nbsp;is&nbsp;better&nbsp;than&nbsp;implicit.</td><td class="diff_next"></td><td class="diff_header" id="to6_33">33</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;2.&nbsp;Explicit&nbsp;is&nbsp;better&nbsp;than&nbsp;implicit.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_34">34</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;3.&nbsp;Simple&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</td><td class="diff_next"></td><td class="diff_header" id="to6_34">34</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;3.&nbsp;Simple&nbsp;is&nbsp;better&nbsp;than&nbsp;complex.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_35">35</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;4.&nbsp;Complex&nbsp;is&nbsp;better&nbsp;than&nbsp;complicated.</td><td class="diff_next"></td><td class="diff_header" id="to6_35">35</td><td nowrap="nowrap">&nbsp;&nbsp;&nbsp;4.&nbsp;Complex&nbsp;is&nbsp;better&nbsp;than&nbsp;complicated.</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_36">36</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to6_36">36</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_37">37</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to6_37">37</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_38">38</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to6_38">38</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_39">39</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to6_39">39</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_40">40</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to6_40">40</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_41">41</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to6_41">41</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_42">42</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to6_42">42</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_43">43</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to6_43">43</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_44">44</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to6_44">44</td><td nowrap="nowrap">123</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from6_45">45</td><td nowrap="nowrap">123</td><td class="diff_next"></td><td class="diff_header" id="to6_45">45</td><td nowrap="nowrap">123</td></tr>
+        </tbody>
+    </table>
+<h2>Empty Context</h2>
+
+    <table class="diff" id="difflib_chg_to7__top"  
+           cellspacing="0" cellpadding="0" rules="groups" > 
+        <colgroup></colgroup> <colgroup></colgroup> <colgroup></colgroup> 
+        <colgroup></colgroup> <colgroup></colgroup> <colgroup></colgroup>
+        <thead><tr><th class="diff_next"><br /></th><th colspan="2" class="diff_header">from</th><th class="diff_next"><br /></th><th colspan="2" class="diff_header">to</th></tr></thead>
+        <tbody>
+            <tr><td class="diff_next"><a href="#difflib_chg_to7__top">t</a></td><td></td><td>&nbsp;No Differences Found&nbsp;</td><td class="diff_next"><a href="#difflib_chg_to7__top">t</a></td><td></td><td>&nbsp;No Differences Found&nbsp;</td></tr>
+        </tbody>
+    </table>
+<h2>Empty Full</h2>
+
+    <table class="diff" id="difflib_chg_to8__top"  
+           cellspacing="0" cellpadding="0" rules="groups" > 
+        <colgroup></colgroup> <colgroup></colgroup> <colgroup></colgroup> 
+        <colgroup></colgroup> <colgroup></colgroup> <colgroup></colgroup>
+        <thead><tr><th class="diff_next"><br /></th><th colspan="2" class="diff_header">from</th><th class="diff_next"><br /></th><th colspan="2" class="diff_header">to</th></tr></thead>
+        <tbody>
+            <tr><td class="diff_next"><a href="#difflib_chg_to8__top">t</a></td><td></td><td>&nbsp;Empty File&nbsp;</td><td class="diff_next"><a href="#difflib_chg_to8__top">t</a></td><td></td><td>&nbsp;Empty File&nbsp;</td></tr>
+        </tbody>
+    </table>
+<h2>tabsize=2</h2>
+
+    <table class="diff" id="difflib_chg_to9__top"  
+           cellspacing="0" cellpadding="0" rules="groups" > 
+        <colgroup></colgroup> <colgroup></colgroup> <colgroup></colgroup> 
+        <colgroup></colgroup> <colgroup></colgroup> <colgroup></colgroup>
+        
+        <tbody>
+            <tr><td class="diff_next" id="difflib_chg_to9__0"><a href="#difflib_chg_to9__0">f</a></td><td class="diff_header" id="from9_1">1</td><td nowrap="nowrap"></td><td class="diff_next"><a href="#difflib_chg_to9__0">f</a></td><td class="diff_header" id="to9_1">1</td><td nowrap="nowrap"></td></tr>
+            <tr><td class="diff_next"><a href="#difflib_chg_to9__top">t</a></td><td class="diff_header" id="from9_2">2</td><td nowrap="nowrap"><span class="diff_chg">&nbsp;&nbsp;&nbsp;&nbsp;</span>Line&nbsp;1:&nbsp;preceeded&nbsp;by&nbsp;from:[tt]&nbsp;to:[ssss]</td><td class="diff_next"><a href="#difflib_chg_to9__top">t</a></td><td class="diff_header" id="to9_2">2</td><td nowrap="nowrap"><span class="diff_chg">&nbsp;&nbsp;&nbsp;&nbsp;</span>Line&nbsp;1:&nbsp;preceeded&nbsp;by&nbsp;from:[tt]&nbsp;to:[ssss]</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from9_3">3</td><td nowrap="nowrap">&nbsp;&nbsp;<span class="diff_chg">&nbsp;&nbsp;</span>&nbsp;&nbsp;Line&nbsp;2:&nbsp;preceeded&nbsp;by&nbsp;from:[sstt]&nbsp;to:[sssst]</td><td class="diff_next"></td><td class="diff_header" id="to9_3">3</td><td nowrap="nowrap">&nbsp;&nbsp;<span class="diff_chg">&nbsp;&nbsp;</span>&nbsp;&nbsp;Line&nbsp;2:&nbsp;preceeded&nbsp;by&nbsp;from:[sstt]&nbsp;to:[sssst]</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from9_4">4</td><td nowrap="nowrap">&nbsp;&nbsp;<span class="diff_chg">&nbsp;&nbsp;&nbsp;&nbsp;</span>Line&nbsp;3:&nbsp;preceeded&nbsp;by&nbsp;from:[sstst]&nbsp;to:[ssssss]</td><td class="diff_next"></td><td class="diff_header" id="to9_4">4</td><td nowrap="nowrap">&nbsp;&nbsp;<span class="diff_chg">&nbsp;&nbsp;&nbsp;&nbsp;</span>Line&nbsp;3:&nbsp;preceeded&nbsp;by&nbsp;from:[sstst]&nbsp;to:[ssssss]</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from9_5">5</td><td nowrap="nowrap">Line&nbsp;4:&nbsp;&nbsp;<span class="diff_chg">&nbsp;</span>has&nbsp;from:[sst]&nbsp;to:[sss]&nbsp;after&nbsp;:</td><td class="diff_next"></td><td class="diff_header" id="to9_5">5</td><td nowrap="nowrap">Line&nbsp;4:&nbsp;&nbsp;<span class="diff_chg">&nbsp;</span>has&nbsp;from:[sst]&nbsp;to:[sss]&nbsp;after&nbsp;:</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from9_6">6</td><td nowrap="nowrap">Line&nbsp;5:&nbsp;has&nbsp;from:[t]&nbsp;to:[ss]&nbsp;at&nbsp;end<span class="diff_chg">&nbsp;</span></td><td class="diff_next"></td><td class="diff_header" id="to9_6">6</td><td nowrap="nowrap">Line&nbsp;5:&nbsp;has&nbsp;from:[t]&nbsp;to:[ss]&nbsp;at&nbsp;end<span class="diff_chg">&nbsp;&nbsp;</span></td></tr>
+        </tbody>
+    </table>
+<h2>tabsize=default</h2>
+
+    <table class="diff" id="difflib_chg_to10__top"  
+           cellspacing="0" cellpadding="0" rules="groups" > 
+        <colgroup></colgroup> <colgroup></colgroup> <colgroup></colgroup> 
+        <colgroup></colgroup> <colgroup></colgroup> <colgroup></colgroup>
+        
+        <tbody>
+            <tr><td class="diff_next" id="difflib_chg_to10__0"><a href="#difflib_chg_to10__0">f</a></td><td class="diff_header" id="from10_1">1</td><td nowrap="nowrap"></td><td class="diff_next"><a href="#difflib_chg_to10__0">f</a></td><td class="diff_header" id="to10_1">1</td><td nowrap="nowrap"></td></tr>
+            <tr><td class="diff_next"><a href="#difflib_chg_to10__top">t</a></td><td class="diff_header" id="from10_2">2</td><td nowrap="nowrap"><span class="diff_chg">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span>Line&nbsp;1:&nbsp;preceeded&nbsp;by&nbsp;from:[tt]&nbsp;to:[ssss]</td><td class="diff_next"><a href="#difflib_chg_to10__top">t</a></td><td class="diff_header" id="to10_2">2</td><td nowrap="nowrap"><span class="diff_chg">&nbsp;&nbsp;&nbsp;&nbsp;</span>Line&nbsp;1:&nbsp;preceeded&nbsp;by&nbsp;from:[tt]&nbsp;to:[ssss]</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from10_3">3</td><td nowrap="nowrap">&nbsp;&nbsp;<span class="diff_chg">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span>&nbsp;&nbsp;&nbsp;&nbsp;Line&nbsp;2:&nbsp;preceeded&nbsp;by&nbsp;from:[sstt]&nbsp;to:[sssst]</td><td class="diff_next"></td><td class="diff_header" id="to10_3">3</td><td nowrap="nowrap">&nbsp;&nbsp;<span class="diff_chg">&nbsp;&nbsp;</span>&nbsp;&nbsp;&nbsp;&nbsp;Line&nbsp;2:&nbsp;preceeded&nbsp;by&nbsp;from:[sstt]&nbsp;to:[sssst]</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from10_4">4</td><td nowrap="nowrap">&nbsp;&nbsp;<span class="diff_chg">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span>Line&nbsp;3:&nbsp;preceeded&nbsp;by&nbsp;from:[sstst]&nbsp;to:[ssssss]</td><td class="diff_next"></td><td class="diff_header" id="to10_4">4</td><td nowrap="nowrap">&nbsp;&nbsp;<span class="diff_chg">&nbsp;&nbsp;&nbsp;&nbsp;</span>Line&nbsp;3:&nbsp;preceeded&nbsp;by&nbsp;from:[sstst]&nbsp;to:[ssssss]</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from10_5">5</td><td nowrap="nowrap">Line&nbsp;4:&nbsp;&nbsp;<span class="diff_chg">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span>has&nbsp;from:[sst]&nbsp;to:[sss]&nbsp;after&nbsp;:</td><td class="diff_next"></td><td class="diff_header" id="to10_5">5</td><td nowrap="nowrap">Line&nbsp;4:&nbsp;&nbsp;<span class="diff_chg">&nbsp;</span>has&nbsp;from:[sst]&nbsp;to:[sss]&nbsp;after&nbsp;:</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from10_6">6</td><td nowrap="nowrap">Line&nbsp;5:&nbsp;has&nbsp;from:[t]&nbsp;to:[ss]&nbsp;at&nbsp;end<span class="diff_chg">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></td><td class="diff_next"></td><td class="diff_header" id="to10_6">6</td><td nowrap="nowrap">Line&nbsp;5:&nbsp;has&nbsp;from:[t]&nbsp;to:[ss]&nbsp;at&nbsp;end<span class="diff_chg">&nbsp;&nbsp;</span></td></tr>
+        </tbody>
+    </table>
+<h2>Context (wrapcolumn=14,numlines=0)</h2>
+
+    <table class="diff" id="difflib_chg_to11__top"  
+           cellspacing="0" cellpadding="0" rules="groups" > 
+        <colgroup></colgroup> <colgroup></colgroup> <colgroup></colgroup> 
+        <colgroup></colgroup> <colgroup></colgroup> <colgroup></colgroup>
+        
+        <tbody>
+            <tr><td class="diff_next" id="difflib_chg_to11__0"><a href="#difflib_chg_to11__1">n</a></td><td class="diff_header" id="from11_4">4</td><td nowrap="nowrap"><span class="diff_sub">line&nbsp;2</span></td><td class="diff_next"><a href="#difflib_chg_to11__1">n</a></td><td class="diff_header" id="to11_4">4</td><td nowrap="nowrap"><span class="diff_add">line&nbsp;2&nbsp;&nbsp;&nbsp;&nbsp;adde</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap">&nbsp;</td><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap"><span class="diff_add">d</span></td></tr>
+        </tbody>        
+        <tbody>
+            <tr><td class="diff_next" id="difflib_chg_to11__1"><a href="#difflib_chg_to11__2">n</a></td><td class="diff_header" id="from11_6">6</td><td nowrap="nowrap">line&nbsp;4&nbsp;&nbsp;&nbsp;chan<span class="diff_chg">g</span></td><td class="diff_next"><a href="#difflib_chg_to11__2">n</a></td><td class="diff_header" id="to11_6">6</td><td nowrap="nowrap">line&nbsp;4&nbsp;&nbsp;&nbsp;chan<span class="diff_chg">G</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap"><span class="diff_chg">e</span>d&nbsp;</td><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap"><span class="diff_chg">E</span>d&nbsp;</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from11_7">7</td><td nowrap="nowrap">line&nbsp;5<span class="diff_chg">&nbsp;</span>&nbsp;&nbsp;chan<span class="diff_chg">g</span></td><td class="diff_next"></td><td class="diff_header" id="to11_7">7</td><td nowrap="nowrap">line&nbsp;5<span class="diff_chg">a</span>&nbsp;&nbsp;chan<span class="diff_chg">G</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap"><span class="diff_chg"></span>ed&nbsp;</td><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap"><span class="diff_chg"></span>ed&nbsp;</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from11_8">8</td><td nowrap="nowrap">line&nbsp;6<span class="diff_chg">&nbsp;</span>&nbsp;&nbsp;chang</td><td class="diff_next"></td><td class="diff_header" id="to11_8">8</td><td nowrap="nowrap">line&nbsp;6<span class="diff_chg">a</span>&nbsp;&nbsp;chang</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap"><span class="diff_chg">e</span>d&nbsp;</td><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap"><span class="diff_chg">E</span>d&nbsp;</td></tr>
+        </tbody>        
+        <tbody>
+            <tr><td class="diff_next" id="difflib_chg_to11__2"><a href="#difflib_chg_to11__3">n</a></td><td class="diff_header" id="from11_10">10</td><td nowrap="nowrap"><span class="diff_sub">line&nbsp;8&nbsp;&nbsp;subtra</span></td><td class="diff_next"><a href="#difflib_chg_to11__3">n</a></td><td class="diff_header" id="to11_10">10</td><td nowrap="nowrap"><span class="diff_add">line&nbsp;8</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap"><span class="diff_sub">cted</span></td><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap">&nbsp;</td></tr>
+        </tbody>        
+        <tbody>
+            <tr><td class="diff_next" id="difflib_chg_to11__3"><a href="#difflib_chg_to11__top">t</a></td><td class="diff_header" id="from11_12">12</td><td nowrap="nowrap"><span class="diff_sub">12345678901234</span></td><td class="diff_next"><a href="#difflib_chg_to11__top">t</a></td><td class="diff_header" id="to11_12">12</td><td nowrap="nowrap"><span class="diff_add">1234567890</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap"><span class="diff_sub">56789012345689</span></td><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap">&nbsp;</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap"><span class="diff_sub">012345</span></td><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap">&nbsp;</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from11_13">13</td><td nowrap="nowrap"><span class="diff_sub">short&nbsp;line</span></td><td class="diff_next"></td><td class="diff_header" id="to11_13">13</td><td nowrap="nowrap"><span class="diff_add">another&nbsp;long&nbsp;l</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap">&nbsp;</td><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap"><span class="diff_add">ine&nbsp;that&nbsp;needs</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap">&nbsp;</td><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap"><span class="diff_add">&nbsp;to&nbsp;be&nbsp;wrapped</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from11_14">14</td><td nowrap="nowrap">just&nbsp;fit<span class="diff_chg">s</span>&nbsp;in!!</td><td class="diff_next"></td><td class="diff_header" id="to11_14">14</td><td nowrap="nowrap">just&nbsp;fit<span class="diff_chg">S</span>&nbsp;in!!</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from11_15">15</td><td nowrap="nowrap">just&nbsp;fits&nbsp;in&nbsp;t</td><td class="diff_next"></td><td class="diff_header" id="to11_15">15</td><td nowrap="nowrap">just&nbsp;fits&nbsp;in&nbsp;t</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap">wo&nbsp;line<span class="diff_chg">s</span>&nbsp;yup!!</td><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap">wo&nbsp;line<span class="diff_chg">S</span>&nbsp;yup!!</td></tr>
+        </tbody>
+    </table>
+<h2>wrapcolumn=14,splitlines()</h2>
+
+    <table class="diff" id="difflib_chg_to12__top"  
+           cellspacing="0" cellpadding="0" rules="groups" > 
+        <colgroup></colgroup> <colgroup></colgroup> <colgroup></colgroup> 
+        <colgroup></colgroup> <colgroup></colgroup> <colgroup></colgroup>
+        
+        <tbody>
+            <tr><td class="diff_next" id="difflib_chg_to12__0"><a href="#difflib_chg_to12__0">f</a></td><td class="diff_header" id="from12_1">1</td><td nowrap="nowrap">line&nbsp;0</td><td class="diff_next"><a href="#difflib_chg_to12__0">f</a></td><td class="diff_header" id="to12_1">1</td><td nowrap="nowrap">line&nbsp;0</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from12_2">2</td><td nowrap="nowrap">12345678901234</td><td class="diff_next"></td><td class="diff_header" id="to12_2">2</td><td nowrap="nowrap">12345678901234</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap">56789012345689</td><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap">56789012345689</td></tr>
+            <tr><td class="diff_next" id="difflib_chg_to12__1"></td><td class="diff_header">></td><td nowrap="nowrap">012345</td><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap">012345</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from12_3">3</td><td nowrap="nowrap">line&nbsp;1</td><td class="diff_next"></td><td class="diff_header" id="to12_3">3</td><td nowrap="nowrap">line&nbsp;1</td></tr>
+            <tr><td class="diff_next"><a href="#difflib_chg_to12__1">n</a></td><td class="diff_header" id="from12_4">4</td><td nowrap="nowrap"><span class="diff_sub">line&nbsp;2</span></td><td class="diff_next"><a href="#difflib_chg_to12__1">n</a></td><td class="diff_header" id="to12_4">4</td><td nowrap="nowrap"><span class="diff_add">line&nbsp;2&nbsp;&nbsp;&nbsp;&nbsp;adde</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap">&nbsp;</td><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap"><span class="diff_add">d</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from12_5">5</td><td nowrap="nowrap">line&nbsp;3</td><td class="diff_next"></td><td class="diff_header" id="to12_5">5</td><td nowrap="nowrap">line&nbsp;3</td></tr>
+            <tr><td class="diff_next"><a href="#difflib_chg_to12__2">n</a></td><td class="diff_header" id="from12_6">6</td><td nowrap="nowrap">line&nbsp;4&nbsp;&nbsp;&nbsp;chan<span class="diff_chg">g</span></td><td class="diff_next"><a href="#difflib_chg_to12__2">n</a></td><td class="diff_header" id="to12_6">6</td><td nowrap="nowrap">line&nbsp;4&nbsp;&nbsp;&nbsp;chan<span class="diff_chg">G</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap"><span class="diff_chg">e</span>d&nbsp;</td><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap"><span class="diff_chg">E</span>d&nbsp;</td></tr>
+            <tr><td class="diff_next" id="difflib_chg_to12__2"></td><td class="diff_header" id="from12_7">7</td><td nowrap="nowrap">line&nbsp;5<span class="diff_chg">&nbsp;</span>&nbsp;&nbsp;chan<span class="diff_chg">g</span></td><td class="diff_next"></td><td class="diff_header" id="to12_7">7</td><td nowrap="nowrap">line&nbsp;5<span class="diff_chg">a</span>&nbsp;&nbsp;chan<span class="diff_chg">G</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap"><span class="diff_chg"></span>ed&nbsp;</td><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap"><span class="diff_chg"></span>ed&nbsp;</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from12_8">8</td><td nowrap="nowrap">line&nbsp;6<span class="diff_chg">&nbsp;</span>&nbsp;&nbsp;chang</td><td class="diff_next"></td><td class="diff_header" id="to12_8">8</td><td nowrap="nowrap">line&nbsp;6<span class="diff_chg">a</span>&nbsp;&nbsp;chang</td></tr>
+            <tr><td class="diff_next" id="difflib_chg_to12__3"></td><td class="diff_header">></td><td nowrap="nowrap"><span class="diff_chg">e</span>d&nbsp;</td><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap"><span class="diff_chg">E</span>d&nbsp;</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from12_9">9</td><td nowrap="nowrap">line&nbsp;7</td><td class="diff_next"></td><td class="diff_header" id="to12_9">9</td><td nowrap="nowrap">line&nbsp;7</td></tr>
+            <tr><td class="diff_next"><a href="#difflib_chg_to12__3">n</a></td><td class="diff_header" id="from12_10">10</td><td nowrap="nowrap"><span class="diff_sub">line&nbsp;8&nbsp;&nbsp;subtra</span></td><td class="diff_next"><a href="#difflib_chg_to12__3">n</a></td><td class="diff_header" id="to12_10">10</td><td nowrap="nowrap"><span class="diff_add">line&nbsp;8</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap"><span class="diff_sub">cted</span></td><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap">&nbsp;</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from12_11">11</td><td nowrap="nowrap">line&nbsp;9</td><td class="diff_next"></td><td class="diff_header" id="to12_11">11</td><td nowrap="nowrap">line&nbsp;9</td></tr>
+            <tr><td class="diff_next"><a href="#difflib_chg_to12__top">t</a></td><td class="diff_header" id="from12_12">12</td><td nowrap="nowrap"><span class="diff_sub">12345678901234</span></td><td class="diff_next"><a href="#difflib_chg_to12__top">t</a></td><td class="diff_header" id="to12_12">12</td><td nowrap="nowrap"><span class="diff_add">1234567890</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap"><span class="diff_sub">56789012345689</span></td><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap">&nbsp;</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap"><span class="diff_sub">012345</span></td><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap">&nbsp;</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from12_13">13</td><td nowrap="nowrap"><span class="diff_sub">short&nbsp;line</span></td><td class="diff_next"></td><td class="diff_header" id="to12_13">13</td><td nowrap="nowrap"><span class="diff_add">another&nbsp;long&nbsp;l</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap">&nbsp;</td><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap"><span class="diff_add">ine&nbsp;that&nbsp;needs</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap">&nbsp;</td><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap"><span class="diff_add">&nbsp;to&nbsp;be&nbsp;wrapped</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from12_14">14</td><td nowrap="nowrap">just&nbsp;fit<span class="diff_chg">s</span>&nbsp;in!!</td><td class="diff_next"></td><td class="diff_header" id="to12_14">14</td><td nowrap="nowrap">just&nbsp;fit<span class="diff_chg">S</span>&nbsp;in!!</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from12_15">15</td><td nowrap="nowrap">just&nbsp;fits&nbsp;in&nbsp;t</td><td class="diff_next"></td><td class="diff_header" id="to12_15">15</td><td nowrap="nowrap">just&nbsp;fits&nbsp;in&nbsp;t</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap">wo&nbsp;line<span class="diff_chg">s</span>&nbsp;yup!!</td><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap">wo&nbsp;line<span class="diff_chg">S</span>&nbsp;yup!!</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from12_16">16</td><td nowrap="nowrap">the&nbsp;end</td><td class="diff_next"></td><td class="diff_header" id="to12_16">16</td><td nowrap="nowrap">the&nbsp;end</td></tr>
+        </tbody>
+    </table>
+<h2>wrapcolumn=14,splitlines(True)</h2>
+
+    <table class="diff" id="difflib_chg_to13__top"  
+           cellspacing="0" cellpadding="0" rules="groups" > 
+        <colgroup></colgroup> <colgroup></colgroup> <colgroup></colgroup> 
+        <colgroup></colgroup> <colgroup></colgroup> <colgroup></colgroup>
+        
+        <tbody>
+            <tr><td class="diff_next" id="difflib_chg_to13__0"><a href="#difflib_chg_to13__0">f</a></td><td class="diff_header" id="from13_1">1</td><td nowrap="nowrap">line&nbsp;0</td><td class="diff_next"><a href="#difflib_chg_to13__0">f</a></td><td class="diff_header" id="to13_1">1</td><td nowrap="nowrap">line&nbsp;0</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from13_2">2</td><td nowrap="nowrap">12345678901234</td><td class="diff_next"></td><td class="diff_header" id="to13_2">2</td><td nowrap="nowrap">12345678901234</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap">56789012345689</td><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap">56789012345689</td></tr>
+            <tr><td class="diff_next" id="difflib_chg_to13__1"></td><td class="diff_header">></td><td nowrap="nowrap">012345</td><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap">012345</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from13_3">3</td><td nowrap="nowrap">line&nbsp;1</td><td class="diff_next"></td><td class="diff_header" id="to13_3">3</td><td nowrap="nowrap">line&nbsp;1</td></tr>
+            <tr><td class="diff_next"><a href="#difflib_chg_to13__1">n</a></td><td class="diff_header" id="from13_4">4</td><td nowrap="nowrap"><span class="diff_sub">line&nbsp;2</span></td><td class="diff_next"><a href="#difflib_chg_to13__1">n</a></td><td class="diff_header" id="to13_4">4</td><td nowrap="nowrap"><span class="diff_add">line&nbsp;2&nbsp;&nbsp;&nbsp;&nbsp;adde</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap">&nbsp;</td><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap"><span class="diff_add">d</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from13_5">5</td><td nowrap="nowrap">line&nbsp;3</td><td class="diff_next"></td><td class="diff_header" id="to13_5">5</td><td nowrap="nowrap">line&nbsp;3</td></tr>
+            <tr><td class="diff_next"><a href="#difflib_chg_to13__2">n</a></td><td class="diff_header" id="from13_6">6</td><td nowrap="nowrap">line&nbsp;4&nbsp;&nbsp;&nbsp;chan<span class="diff_chg">g</span></td><td class="diff_next"><a href="#difflib_chg_to13__2">n</a></td><td class="diff_header" id="to13_6">6</td><td nowrap="nowrap">line&nbsp;4&nbsp;&nbsp;&nbsp;chan<span class="diff_chg">G</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap"><span class="diff_chg">e</span>d&nbsp;</td><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap"><span class="diff_chg">E</span>d&nbsp;</td></tr>
+            <tr><td class="diff_next" id="difflib_chg_to13__2"></td><td class="diff_header" id="from13_7">7</td><td nowrap="nowrap">line&nbsp;5<span class="diff_chg">&nbsp;</span>&nbsp;&nbsp;chan<span class="diff_chg">g</span></td><td class="diff_next"></td><td class="diff_header" id="to13_7">7</td><td nowrap="nowrap">line&nbsp;5<span class="diff_chg">a</span>&nbsp;&nbsp;chan<span class="diff_chg">G</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap"><span class="diff_chg"></span>ed&nbsp;</td><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap"><span class="diff_chg"></span>ed&nbsp;</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from13_8">8</td><td nowrap="nowrap">line&nbsp;6<span class="diff_chg">&nbsp;</span>&nbsp;&nbsp;chang</td><td class="diff_next"></td><td class="diff_header" id="to13_8">8</td><td nowrap="nowrap">line&nbsp;6<span class="diff_chg">a</span>&nbsp;&nbsp;chang</td></tr>
+            <tr><td class="diff_next" id="difflib_chg_to13__3"></td><td class="diff_header">></td><td nowrap="nowrap"><span class="diff_chg">e</span>d&nbsp;</td><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap"><span class="diff_chg">E</span>d&nbsp;</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from13_9">9</td><td nowrap="nowrap">line&nbsp;7</td><td class="diff_next"></td><td class="diff_header" id="to13_9">9</td><td nowrap="nowrap">line&nbsp;7</td></tr>
+            <tr><td class="diff_next"><a href="#difflib_chg_to13__3">n</a></td><td class="diff_header" id="from13_10">10</td><td nowrap="nowrap"><span class="diff_sub">line&nbsp;8&nbsp;&nbsp;subtra</span></td><td class="diff_next"><a href="#difflib_chg_to13__3">n</a></td><td class="diff_header" id="to13_10">10</td><td nowrap="nowrap"><span class="diff_add">line&nbsp;8</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap"><span class="diff_sub">cted</span></td><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap">&nbsp;</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from13_11">11</td><td nowrap="nowrap">line&nbsp;9</td><td class="diff_next"></td><td class="diff_header" id="to13_11">11</td><td nowrap="nowrap">line&nbsp;9</td></tr>
+            <tr><td class="diff_next"><a href="#difflib_chg_to13__top">t</a></td><td class="diff_header" id="from13_12">12</td><td nowrap="nowrap"><span class="diff_sub">12345678901234</span></td><td class="diff_next"><a href="#difflib_chg_to13__top">t</a></td><td class="diff_header" id="to13_12">12</td><td nowrap="nowrap"><span class="diff_add">1234567890</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap"><span class="diff_sub">56789012345689</span></td><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap">&nbsp;</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap"><span class="diff_sub">012345</span></td><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap">&nbsp;</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from13_13">13</td><td nowrap="nowrap"><span class="diff_sub">short&nbsp;line</span></td><td class="diff_next"></td><td class="diff_header" id="to13_13">13</td><td nowrap="nowrap"><span class="diff_add">another&nbsp;long&nbsp;l</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap">&nbsp;</td><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap"><span class="diff_add">ine&nbsp;that&nbsp;needs</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header"></td><td nowrap="nowrap">&nbsp;</td><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap"><span class="diff_add">&nbsp;to&nbsp;be&nbsp;wrapped</span></td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from13_14">14</td><td nowrap="nowrap">just&nbsp;fit<span class="diff_chg">s</span>&nbsp;in!!</td><td class="diff_next"></td><td class="diff_header" id="to13_14">14</td><td nowrap="nowrap">just&nbsp;fit<span class="diff_chg">S</span>&nbsp;in!!</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from13_15">15</td><td nowrap="nowrap">just&nbsp;fits&nbsp;in&nbsp;t</td><td class="diff_next"></td><td class="diff_header" id="to13_15">15</td><td nowrap="nowrap">just&nbsp;fits&nbsp;in&nbsp;t</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap">wo&nbsp;line<span class="diff_chg">s</span>&nbsp;yup!!</td><td class="diff_next"></td><td class="diff_header">></td><td nowrap="nowrap">wo&nbsp;line<span class="diff_chg">S</span>&nbsp;yup!!</td></tr>
+            <tr><td class="diff_next"></td><td class="diff_header" id="from13_16">16</td><td nowrap="nowrap">the&nbsp;end</td><td class="diff_next"></td><td class="diff_header" id="to13_16">16</td><td nowrap="nowrap">the&nbsp;end</td></tr>
+        </tbody>
+    </table>
+</body>
+
+</html>

Misc/ACKS

@@ -201,6 +201,7 @@ Raymund Galvin
 Nitin Ganatra
 Fred Gansevles
 Lars Marius Garshol
+Dan Gass
 Andrew Gaul
 Stephen M. Gava
 Harry Henry Gebel

Misc/NEWS

@@ -47,6 +47,8 @@ Core and builtins
 Extension modules
 -----------------
 
+- difflib now supports HTML side-by-side diff.
+
 - os.urandom has been added for systems that support sources of random
   data.
 
@@ -63,6 +65,8 @@ Extension modules
 Library
 -------
 
+- difflib and diff.py can now generate HTML.
+
 - bdist_rpm now includes version and release in the BuildRoot, and
   replaces - by ``_`` in version and release.
 

Tools/scripts/diff.py

@@ -1,8 +1,9 @@
-""" Command line interface to difflib.py providing diffs in three formats:
+""" Command line interface to difflib.py providing diffs in four formats:
 
 * ndiff:    lists every line and highlights interline changes.
-* context:  highlights clusters of changes in a before/after format
+* context:  highlights clusters of changes in a before/after format.
 * unified:  highlights clusters of changes in an inline format.
+* html:     generates side by side comparison with change highlights.
 
 """
 
@@ -14,6 +15,7 @@ def main():
     parser = optparse.OptionParser(usage)
     parser.add_option("-c", action="store_true", default=False, help='Produce a context format diff (default)')
     parser.add_option("-u", action="store_true", default=False, help='Produce a unified format diff')
+    parser.add_option("-m", action="store_true", default=False, help='Produce HTML side by side diff (can use -c and -l in conjunction)')
     parser.add_option("-n", action="store_true", default=False, help='Produce a ndiff format diff')
     parser.add_option("-l", "--lines", type="int", default=3, help='Set number of context lines (default 3)')
     (options, args) = parser.parse_args()
@@ -36,6 +38,8 @@ def main():
         diff = difflib.unified_diff(fromlines, tolines, fromfile, tofile, fromdate, todate, n=n)
     elif options.n:
         diff = difflib.ndiff(fromlines, tolines)
+    elif options.m:
+        diff = difflib.HtmlDiff().make_file(fromlines,tolines,fromfile,tofile,context=options.c,numlines=n)
     else:
         diff = difflib.context_diff(fromlines, tolines, fromfile, tofile, fromdate, todate, n=n)