Merged revisions 83536,83546-83548,83550,83554-83555,83558,83563,83565,83571,83574-83575 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/py3k

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  r83536 | georg.brandl | 2010-08-02 19:49:25 +0200 (Mo, 02 Aug 2010) | 1 line

  #8578: mention danger of not incref'ing weak referenced object.
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  r83546 | georg.brandl | 2010-08-02 21:16:34 +0200 (Mo, 02 Aug 2010) | 1 line

  #7973: Fix distutils options spelling.
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  r83547 | georg.brandl | 2010-08-02 21:19:26 +0200 (Mo, 02 Aug 2010) | 1 line

  #7386: add example that shows that trailing path separators are stripped.
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  r83548 | georg.brandl | 2010-08-02 21:23:34 +0200 (Mo, 02 Aug 2010) | 1 line

  #8172: how does one use a property?
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  r83550 | georg.brandl | 2010-08-02 21:32:43 +0200 (Mo, 02 Aug 2010) | 1 line

  #9451: strengthen warning about __*__ special name usage.
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  r83554 | georg.brandl | 2010-08-02 21:43:05 +0200 (Mo, 02 Aug 2010) | 1 line

  #7280: note about nasmw.exe.
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  r83555 | georg.brandl | 2010-08-02 21:44:48 +0200 (Mo, 02 Aug 2010) | 1 line

  #8861: remove unused variable.
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  r83558 | georg.brandl | 2010-08-02 22:05:19 +0200 (Mo, 02 Aug 2010) | 1 line

  #8648: document UTF-7 codec functions.
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  r83563 | georg.brandl | 2010-08-02 22:21:21 +0200 (Mo, 02 Aug 2010) | 1 line

  #9037: add example how to raise custom exceptions from C code.
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  r83565 | georg.brandl | 2010-08-02 22:27:20 +0200 (Mo, 02 Aug 2010) | 1 line

  #9111: document that do_help() looks at docstrings.
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  r83571 | georg.brandl | 2010-08-02 22:44:34 +0200 (Mo, 02 Aug 2010) | 1 line

  Clarify that abs() is not a namespace.
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  r83574 | georg.brandl | 2010-08-02 22:47:56 +0200 (Mo, 02 Aug 2010) | 1 line

  #6867: epoll.register() returns None.
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  r83575 | georg.brandl | 2010-08-02 22:52:10 +0200 (Mo, 02 Aug 2010) | 1 line

  #9238: zipfile does handle archive comments.
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diff --git a/Doc/library/cmd.rst b/Doc/library/cmd.rst
index 5782b5b..cc49990 100644
--- a/Doc/library/cmd.rst
+++ b/Doc/library/cmd.rst
@@ -80,11 +80,13 @@
    are the beginning and ending indexes of the prefix text, which could be used to
    provide different completion depending upon which position the argument is in.
 
-   All subclasses of :class:`Cmd` inherit a predefined :meth:`do_help`. This
+   All subclasses of :class:`Cmd` inherit a predefined :meth:`do_help`.  This
    method, called with an argument ``'bar'``, invokes the corresponding method
-   :meth:`help_bar`.  With no argument, :meth:`do_help` lists all available help
-   topics (that is, all commands with corresponding :meth:`help_\*` methods), and
-   also lists any undocumented commands.
+   :meth:`help_bar`, and if that is not present, prints the docstring of
+   :meth:`do_bar`, if available.  With no argument, :meth:`do_help` lists all
+   available help topics (that is, all commands with corresponding
+   :meth:`help_\*` methods or commands that have docstrings), and also lists any
+   undocumented commands.
 
 
 .. method:: Cmd.onecmd(str)