[issue37210] Pure Python pickle module should not depend on _pickle.PickleBuffer

[STINNER Victor]

Change by STINNER Victor <vstinner at redhat.com>:


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pull_requests: +13881
pull_request: https://github.com/python/cpython/pull/14016

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue37210>
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