[issue18236] str.isspace should use the Unicode White_Space property

[Alexander Belopolsky]

Changes by Alexander Belopolsky <alexander.belopolsky at gmail.com>:


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assignee: belopolsky -> 
keywords:  -needs review, patch
stage: commit review -> needs patch
versions: +Python 3.5 -Python 3.3, Python 3.4

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18236>
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