[docs] [issue26330] shutil.disk_usage() on Windows can't properly handle unicode

[Cheryl Sabella]

Change by Cheryl Sabella <chekat2 at gmail.com>:


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versions: +Python 3.7 -Python 3.3, Python 3.4, Python 3.5, Python 3.6

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue26330>
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