[issue39337] codecs.lookup() ignores non-ASCII characters, whereas encodings.normalize_encoding() copies them

[STINNER Victor]

STINNER Victor <vstinner at python.org> added the comment:

> _testcapi must test the public Python C API, not CPython internal C API

Use _testinternalcapi in this case.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue39337>
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