[docs] [issue19539] The 'raw_unicode_escape' codec buggy + not appropriate for Python 3.x

[Berker Peksag]

Changes by Berker Peksag <berker.peksag at gmail.com>:


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stage: needs patch -> resolved
superseder:  -> 'codecs' module docs improvements

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue19539>
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