Merged revisions 68134 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/trunk

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  r68134 | hirokazu.yamamoto | 2009-01-02 00:45:39 +0900 | 2 lines

  Issue #4797: IOError.filename was not set when _fileio.FileIO failed to open
  file with `str' filename on Windows.
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