Merged revisions 68980 via svnmerge from

Merged revisions 68980 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/py3k

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  r68980 | mark.dickinson | 2009-01-26 21:56:07 +0000 (Mon, 26 Jan 2009) | 14 lines

  Merged revisions 68974-68975 via svnmerge from
  svn+ssh://pythondev@svn.python.org/python/trunk

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    r68974 | mark.dickinson | 2009-01-26 21:36:30 +0000 (Mon, 26 Jan 2009) | 4 lines

    Fix undefined behaviour (left shift of negative value) in long_hash.  Also,
    rewrap a line of length > 79, and update comments.
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    r68975 | mark.dickinson | 2009-01-26 21:40:08 +0000 (Mon, 26 Jan 2009) | 2 lines

    Fix comment.
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