[issue20776] Add tests for importlib.machinery.PathFinder

[Roundup Robot]

Roundup Robot added the comment:

New changeset fa439bb9d705 by Brett Cannon in branch 'default':
Issue #20776: Flesh out tests for importlib.machinery.PathFinder.
http://hg.python.org/cpython/rev/fa439bb9d705

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nosy: +python-dev

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue20776>
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