Merged revisions 83442 via svnmerge from

Merged revisions 83442 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/release27-maint

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  r83442 | antoine.pitrou | 2010-08-01 22:13:11 +0200 (dim., 01 août 2010) | 10 lines

  Merged revisions 83440 via svnmerge from
  svn+ssh://pythondev@svn.python.org/python/branches/py3k

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    r83440 | antoine.pitrou | 2010-08-01 22:08:46 +0200 (dim., 01 août 2010) | 4 lines

    Issue #8397: Raise an error when attempting to mix iteration and regular
    reads on a BZ2File object, rather than returning incorrect results.
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