Merged revisions 80521 via svnmerge from

Merged revisions 80521 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/py3k

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  r80521 | r.david.murray | 2010-04-26 22:45:53 -0400 (Mon, 26 Apr 2010) | 13 lines

  Merged revisions 80512 via svnmerge from
  svn+ssh://pythondev@svn.python.org/python/trunk

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    r80512 | r.david.murray | 2010-04-26 17:17:14 -0400 (Mon, 26 Apr 2010) | 7 lines

    Issue #6656: fix locale.format_string to handle escaped percents and mappings.

    Refactors format_string.  Includes tests for the two problems noted in
    the issue, but as far as I can see there are no other tests that confirm
    that format_string conforms to normal % formatting rules.
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