[issue4874] decoding functions in _codecs module accept str arguments

[STINNER Victor]

STINNER Victor <victor.stinner at haypocalc.com> added the comment:

New patch:
 - Leave unicode_escape_decode() and raw_unicode_escape_decode() 
unchanged (still accept unicode string)
 - Test changes (reject unicode for most codecs decode functions)
 - Write tests for unicode_escape_decode() and 
raw_unicode_escape_decode() (there was no test for these functions)

Added file: http://bugs.python.org/file12770/_codecs_bytes-2.patch

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<http://bugs.python.org/issue4874>
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