Merged revisions 67910 via svnmerge from

Merged revisions 67910 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/py3k

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  r67910 | skip.montanaro | 2008-12-22 21:51:14 -0600 (Mon, 22 Dec 2008) | 11 lines

  Merged revisions 67908 via svnmerge from
  svn+ssh://pythondev@svn.python.org/python/trunk

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    r67908 | skip.montanaro | 2008-12-22 21:30:15 -0600 (Mon, 22 Dec 2008) | 4 lines

    As a result of a regression that snuck into 2.5.3 add a test case that
    ensures that when you try to read from a file opened for writing an IOError
    is raised.
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