Missing property from previous changeset r78621.

Recorded merge of revisions 78620 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

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  r78620 | florent.xicluna | 2010-03-03 12:49:53 +0100 (mer, 03 mar 2010) | 2 lines

  Revert a nonexistent docstring typo, r42805.
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