Merged revisions 84655 via svnmerge from

Merged revisions 84655 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/py3k

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  r84655 | antoine.pitrou | 2010-09-09 22:30:23 +0200 (jeu., 09 sept. 2010) | 6 lines

  Issue #9804: ascii() now always represents unicode surrogate pairs as
  a single `\UXXXXXXXX`, regardless of whether the character is printable
  or not.  Also, the "backslashreplace" error handler now joins surrogate
  pairs into a single character on UCS-2 builds.
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