Merged revisions 74128 via svnmerge from

Merged revisions 74128 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/py3k

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  r74128 | alexandre.vassalotti | 2009-07-20 20:51:58 -0400 (Mon, 20 Jul 2009) | 14 lines

  Merged revisions 73706,73778 via svnmerge from
  svn+ssh://pythondev@svn.python.org/python/trunk

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    r73706 | georg.brandl | 2009-06-30 12:18:55 -0400 (Tue, 30 Jun 2009) | 1 line

    #6384: Add a heading for the exception hierarchy.
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    r73778 | r.david.murray | 2009-07-02 14:19:20 -0400 (Thu, 02 Jul 2009) | 3 lines

    Issue 6389: add documentation for the 'mode' flags defined in the
    stat module.
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