[issue15502] Meta path finders and path entry finders are different, but share an ABC

[Brett Cannon]

Brett Cannon added the comment:

Eric's latest patch LGTM except for the missing patch for test.test_importlib.test_abc to fix the inheritance checks.

Nick, Eric Smith, or Barry: can you double-check the patch is good? About the only thing that might be questionable is having MetaPathFinder and PathEntryFinder not inherit from Finder itself, but that does make sense and we do have multiple inheritance for a reason in Python.

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stage: needs patch -> commit review

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue15502>
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