[issue24881] _pyio checks that `os.name == 'win32'` instead of 'nt'

[Zachary Ware]

Changes by Zachary Ware <zachary.ware at gmail.com>:


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components: +Windows
nosy: +paul.moore, steve.dower, tim.golden, zach.ware
versions: +Python 3.4, Python 3.6

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue24881>
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