[issue17566] Make importlib.abc.Loader.module_repr optional

[Brett Cannon]

Brett Cannon added the comment:

Fixed by http://hg.python.org/cpython/rev/8e733e30edf6 by raising NotImplementedError and relying on the fact that ModuleType.__repr__() swallows any exception.

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resolution:  -> fixed
stage: needs patch -> committed/rejected
status: open -> closed

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<http://bugs.python.org/issue17566>
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