Merged revisions 81739 via svnmerge from

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

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  r81739 | michael.foord | 2010-06-05 13:10:52 +0100 (Sat, 05 Jun 2010) | 1 line

  Removed the new max_diff argument to assertSequenceEqual. All unittest.TestCase assert methods that use difflib to produce failure messages now truncate overly long messages. New class attribute unittest.TestCase.maxDiff to configure this if necessary. Issue 8351.
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