[issue40592] `Shutil.which` incosistent with windows's `where`

[Serhiy Storchaka]

Change by Serhiy Storchaka <storchaka+cpython at gmail.com>:


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components: +Windows
nosy: +paul.moore, steve.dower, tim.golden, zach.ware

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue40592>
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