[issue35489] Argument Clinic should use "const Py_UNICODE *" for the Py_UNICODE converter

[Serhiy Storchaka]

Change by Serhiy Storchaka <storchaka+cpython at gmail.com>:


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pull_requests: +10380

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue35489>
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