[issue38691] importlib: PYTHONCASEOK should be ignored when using python3 -E

[Ido Michael]

Change by Ido Michael <michael.ido at gmail.com>:


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pull_requests: +17977
pull_request: https://github.com/python/cpython/pull/18612

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue38691>
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