Merged revisions 88475 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/branches/py3k

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  r88475 | ned.deily | 2011-02-21 12:44:27 -0800 (Mon, 21 Feb 2011) | 3 lines

  Issue #11268: Prevent Mac OS X Installer failure if Documentation
  package had previously been installed.
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