Merged revisions 66144 via svnmerge from

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

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  r66144 | nick.coghlan | 2008-09-02 20:14:47 +1000 (Tue, 02 Sep 2008) | 1 line

  Issue 3747: Fix caching in ABCMeta.__subclasscheck__ (R: Georg Brandl)
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