Merged revisions 82773 via svnmerge from

Merged revisions 82773 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/release27-maint

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  r82773 | r.david.murray | 2010-07-10 10:25:18 -0400 (Sat, 10 Jul 2010) | 9 lines

  Merged revisions 82771 via svnmerge from
  svn+ssh://pythondev@svn.python.org/python/branches/py3k

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    r82771 | r.david.murray | 2010-07-10 10:23:36 -0400 (Sat, 10 Jul 2010) | 2 lines

    Add missing docs for re module 'purge' function.
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