[issue12892] UTF-16 and UTF-32 codecs should reject (lone) surrogates

[Serhiy Storchaka]

Changes by Serhiy Storchaka <storchaka at gmail.com>:


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stage: test needed -> patch review
versions: +Python 3.4 -Python 3.3

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue12892>
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