Merged revisions 68112,68115,68120,68133,68141-68142,68145-68146,68148-68149 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

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  r68112 | benjamin.peterson | 2009-01-01 00:48:39 +0100 (Thu, 01 Jan 2009) | 1 line

  #4795 inspect.isgeneratorfunction() should return False instead of None
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  r68115 | benjamin.peterson | 2009-01-01 05:04:41 +0100 (Thu, 01 Jan 2009) | 1 line

  simplfy code
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  r68120 | georg.brandl | 2009-01-01 13:15:31 +0100 (Thu, 01 Jan 2009) | 4 lines

  #4228: Pack negative values the same way as 2.4
  in struct's L format.
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  r68133 | antoine.pitrou | 2009-01-01 16:38:03 +0100 (Thu, 01 Jan 2009) | 1 line

  fill in actual issue number in tests
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  r68141 | benjamin.peterson | 2009-01-01 17:43:12 +0100 (Thu, 01 Jan 2009) | 1 line

  fix highlighting
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  r68142 | benjamin.peterson | 2009-01-01 18:29:49 +0100 (Thu, 01 Jan 2009) | 2 lines

  welcome to 2009, Python!
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  r68145 | amaury.forgeotdarc | 2009-01-02 01:03:54 +0100 (Fri, 02 Jan 2009) | 5 lines

  #4801 _collections module fails to build on cygwin.

  _PyObject_GC_TRACK is the macro version of PyObject_GC_Track,
  and according to documentation it should not be used for extension modules.
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  r68146 | ronald.oussoren | 2009-01-02 11:44:46 +0100 (Fri, 02 Jan 2009) | 2 lines

  Fix for issue4472: "configure --enable-shared doesn't work on OSX"
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  r68148 | ronald.oussoren | 2009-01-02 11:48:31 +0100 (Fri, 02 Jan 2009) | 2 lines

  Forgot to add a NEWS item in my previous checkin
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  r68149 | ronald.oussoren | 2009-01-02 11:50:48 +0100 (Fri, 02 Jan 2009) | 2 lines

  Fix for issue4780
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diff --git a/Lib/inspect.py b/Lib/inspect.py
index 3b58bd8..da55ac6 100644
--- a/Lib/inspect.py
+++ b/Lib/inspect.py
@@ -158,9 +158,8 @@
     Generator function objects provides same attributes as functions.
 
     See isfunction.__doc__ for attributes listing."""
-    if (isfunction(object) or ismethod(object)) and \
-        object.__code__.co_flags & CO_GENERATOR:
-        return True
+    return bool((isfunction(object) or ismethod(object)) and
+                object.__code__.co_flags & CO_GENERATOR)
 
 def isgenerator(object):
     """Return true if the object is a generator.