[issue7775] str.rpartition(sep) -> (tail, sep, head)

[Florent Xicluna]

Changes by Florent Xicluna <laxyf at yahoo.fr>:


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type:  -> behavior
versions: +Python 2.6, Python 2.7, Python 3.2

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue7775>
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