[issue43086] Excess data in not handled properly in binascii.a2b_base64()

[Idan Moral]

Change by Idan Moral <idan22moral at gmail.com>:


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pull_requests: +25796
pull_request: https://github.com/python/cpython/pull/27249

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue43086>
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