[issue18283] shutil.which() should support bytes

[Arfrever Frehtes Taifersar Arahesis]

Changes by Arfrever Frehtes Taifersar Arahesis <Arfrever.FTA at GMail.Com>:


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stage:  -> committed/rejected
versions: +Python 3.4 -Python 3.5

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18283>
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