Merged revisions 74769 via svnmerge from

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

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  r74769 | mark.dickinson | 2009-09-13 12:56:13 +0100 (Sun, 13 Sep 2009) | 3 lines

  Fix potential signed-overflow bug in _PyLong_Format;  also fix
  a couple of whitespace issues.
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