[issue14715] test.support.DirsOnSysPath should be replaced by importlib.test.util.import_state

[Brett Cannon]

Brett Cannon <brett at python.org> added the comment:

So from what I can tell you are advocating not resetting anything by default but instead only save the details and then reset it later. That's fine with me (aligns more with the warnings context manager), the importlib tests will simply need to be updated so as to fix their assumptions that everything gets cleared.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue14715>
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