Add newsitem for the two new unittest methods.

Also, made some whitespace cleanup.

Misc/NEWS

@@ -437,6 +437,12 @@ Extension modules
 Library
 -------
 
+- unittest.py now has two additional methods called assertAlmostEqual()
+  and failIfAlmostEqual().  They implement an approximate comparision
+  by rounding the difference between the two arguments and comparing
+  the result to zero.  Approximate comparision is essential for
+  unit tests of floating point results.
+
 - calendar.py now depends on the new datetime module rather than
   the time module.  As a result, the range of allowable dates
   has been increased.
@@ -964,26 +970,26 @@ Mac
   with an interpreter living in such a .app bundle, this interpreter should
   be used to run any Python script using the window manager (including
   Tkinter or wxPython scripts).
-  
+
 - A new utility PythonLauncher will start a Python interpreter when a .py or
   .pyw script is double-clicked in the Finder. By default .py scripts are
   run with a normal Python interpreter in a Terminal window and .pyw
   files are run with a window-aware pythonw interpreter without a Terminal
   window, but all this can be customized.
-  
+
 - MacPython-OS9 is now Carbon-only, so it runs on Mac OS 9 or Mac OS X and
   possibly on Mac OS 8.6 with the right CarbonLib installed, but not on earlier
   releases.
-  
+
 - Many tools such as BuildApplet.py and gensuitemodule.py now support a command
   line interface too.
-  
+
 - All the Carbon classes are now PEP253 compliant, meaning that you can
   subclass them from Python. Most of the attributes have gone, you should
   now use the accessor function call API, which is also what Apple's
   documentation uses. Some attributes such as grafport.visRgn are still
   available for convenience.
-  
+
 - New Carbon modules File (implementing the APIs in Files.h and Aliases.h)
   and Folder (APIs from Folders.h). The old macfs builtin module is
   gone, and replaced by a Python wrapper around the new modules.
@@ -991,16 +997,16 @@ Mac
 - Pathname handling should now be fully consistent: MacPython-OSX always uses
   unix pathnames and MacPython-OS9 always uses colon-separated Mac pathnames
   (also when running on Mac OS X).
-  
+
 - New Carbon modules Help and AH give access to the Carbon Help Manager.
   There are hooks in the IDE to allow accessing the Python documentation
   (and Apple's Carbon and Cocoa documentation) through the Help Viewer.
   See Mac/OSX/README for converting the Python documentation to a
   Help Viewer comaptible form and installing it.
-  
+
 - OSA support has been redesigned and the generated Python classes now
   mirror the inheritance defined by the underlying OSA classes.
-  
+
 - MacPython no longer maps both \r and \n to \n on input for any text file.
   This feature has been replaced by universal newline support (PEP278).
 
@@ -1645,13 +1651,13 @@ Windows
       signal.signal(signal.SIGBREAK, signal.default_int_handler)
 
       try:
-	  while 1:
-	      pass
+          while 1:
+              pass
       except KeyboardInterrupt:
-	  # We get here on Ctrl+C or Ctrl+Break now; if we had not changed
-	  # SIGBREAK, only on Ctrl+C (and Ctrl+Break would terminate the
-	  # program without the possibility for any Python-level cleanup).
-	  print "Clean exit"
+          # We get here on Ctrl+C or Ctrl+Break now; if we had not changed
+          # SIGBREAK, only on Ctrl+C (and Ctrl+Break would terminate the
+          # program without the possibility for any Python-level cleanup).
+          print "Clean exit"
 
 
 What's New in Python 2.2a4?
@@ -2008,7 +2014,7 @@ C API
 
       double x = PyLong_AsDouble(some_long_object);
       if (x == -1.0 && PyErr_Occurred()) {
-	      /* The conversion failed. */
+              /* The conversion failed. */
       }
 
 - The GC API has been changed.  Extensions that use the old API will still