[issue27186] add os.fspath()

[Roundup Robot]

Roundup Robot added the comment:

New changeset ea7b6a7827a4 by Brett Cannon in branch 'default':
Issue #27186: Update os.fspath()/PyOS_FSPath() to check the return
https://hg.python.org/cpython/rev/ea7b6a7827a4

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue27186>
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