[issue17827] Document and test codecs.encode and codecs.decode

[Nick Coghlan]

Changes by Nick Coghlan <ncoghlan at gmail.com>:


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title: Document codecs.encode and codecs.decode -> Document and test codecs.encode and codecs.decode
versions: +Python 3.3, Python 3.4

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue17827>
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