diff --git a/Lib/test/re_tests.py b/Lib/test/re_tests.py
index a42857a76b3..adc3a7d4837 100755
--- a/Lib/test/re_tests.py
+++ b/Lib/test/re_tests.py
@@ -10,21 +10,21 @@
 # Benchmark suite (needs expansion)
 #
 # The benchmark suite does not test correctness, just speed.  The
-# first element of each tuple is the regex pattern; the second is a 
+# first element of each tuple is the regex pattern; the second is a
 # string to match it against.  The benchmarking code will embed the
-# second string inside several sizes of padding, to test how regex 
+# second string inside several sizes of padding, to test how regex
 # matching performs on large strings.
 
 benchmarks = [
-    ('Python', 'Python'),		# Simple text literal
-    ('.*Python', 'Python'),		# Bad text literal
-    ('.*Python.*', 'Python'),		# Worse text literal
-    ('.*(Python)', 'Python'),		# Bad text literal with grouping
-    
-    ('(Python|Perl|Tcl', 'Perl'),	# Alternation
-    ('(Python|Perl|Tcl)', 'Perl'),	# Grouped alternation
-    ('(Python)\\1', 'PythonPython'),	# Backreference
-    ('([0a-z][a-z]*,)+', 'a5,b7,c9,'),	# Disable the fastmap optimization
+    ('Python', 'Python'),               # Simple text literal
+    ('.*Python', 'Python'),             # Bad text literal
+    ('.*Python.*', 'Python'),           # Worse text literal
+    ('.*(Python)', 'Python'),           # Bad text literal with grouping
+
+    ('(Python|Perl|Tcl', 'Perl'),       # Alternation
+    ('(Python|Perl|Tcl)', 'Perl'),      # Grouped alternation
+    ('(Python)\\1', 'PythonPython'),    # Backreference
+    ('([0a-z][a-z]*,)+', 'a5,b7,c9,'),  # Disable the fastmap optimization
     ('([a-z][a-z0-9]*,)+', 'a5,b7,c9,') # A few sets
 ]
 
@@ -47,7 +47,7 @@ benchmarks = [
 #
 # If the regex isn't expected to work, the latter two elements can be omitted.
 
-tests = [ 
+tests = [
     # Test ?P< and ?P= extensions
     ('(?P<foo_123', '', SYNTAX_ERROR),      # Unterminated group identifier
     ('(?P<1>a)', '', SYNTAX_ERROR),         # Begins with a digit
@@ -75,7 +75,7 @@ tests = [
     (r'[\0a]', '\0', SUCCEED, 'found', '\0'),
     (r'[a\0]', '\0', SUCCEED, 'found', '\0'),
     (r'[^a\0]', '\0', FAIL),
-    
+
     # Test various letter escapes
     (r'\a[\b]\f\n\r\t\v', '\a\b\f\n\r\t\v', SUCCEED, 'found', '\a\b\f\n\r\t\v'),
     (r'[\a][\b][\f][\n][\r][\t][\v]', '\a\b\f\n\r\t\v', SUCCEED, 'found', '\a\b\f\n\r\t\v'),
@@ -86,9 +86,9 @@ tests = [
     (r'\x00f', '\017', SUCCEED, 'found', chr(15)),
     (r'\x00fe', '\376', SUCCEED, 'found', chr(254)),
 
-    (r"^\w+=(\\[\000-\277]|[^\n\\])*", "SRC=eval.c g.c blah blah blah \\\\\n\tapes.c", 
+    (r"^\w+=(\\[\000-\277]|[^\n\\])*", "SRC=eval.c g.c blah blah blah \\\\\n\tapes.c",
      SUCCEED, 'found', "SRC=eval.c g.c blah blah blah \\\\"),
-     
+
     # Test that . only matches \n in DOTALL mode
     ('a.b', 'acb', SUCCEED, 'found', 'acb'),
     ('a.b', 'a\nb', FAIL),
@@ -264,7 +264,7 @@ tests = [
     ('\\09', chr(0) + '9', SUCCEED, 'found', chr(0) + '9'),
     ('\\141', 'a', SUCCEED, 'found', 'a'),
     ('(a)(b)(c)(d)(e)(f)(g)(h)(i)(j)(k)(l)\\119', 'abcdefghijklk9', SUCCEED, 'found+"-"+g11', 'abcdefghijklk9-k'),
-    
+
     # All tests from Perl
 
     ('abc', 'abc', SUCCEED, 'found', 'abc'),
@@ -544,13 +544,13 @@ tests = [
     # Check odd placement of embedded pattern modifiers
 
     ('w(?i)', 'W', SYNTAX_ERROR),
-    
+
     # Comments using the x embedded pattern modifier
 
     ("""(?x)w# comment 1
         x y
-	# comment 2
-	z""", 'wxyz', SUCCEED, 'found', 'wxyz'),
+        # comment 2
+        z""", 'wxyz', SUCCEED, 'found', 'wxyz'),
 
     # using the m embedded pattern modifier
 
@@ -564,7 +564,7 @@ xyz""", SUCCEED, 'found', 'abc'),
     ('(?m)abc$', """jkl
 xyzabc
 123""", SUCCEED, 'found', 'abc'),
-    
+
     # using the s embedded pattern modifier
 
     ('a.b', 'a\nb', FAIL),