[issue9985] difflib.SequenceMatcher has slightly buggy and undocumented caching behavior

[Christoph Burgmer]

Christoph Burgmer <cburgmer at ira.uka.de> added the comment:

BTW, here's the commit that broke the behavior in the first place: http://svn.python.org/view/python/trunk/Lib/difflib.py?r1=54230&r2=59907

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