[issue39055] base64.b64decode() with validate=True does not raise for a trailing \n

[miss-islington]

Change by miss-islington <mariatta.wijaya+miss-islington at gmail.com>:


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pull_requests: +17260
pull_request: https://github.com/python/cpython/pull/17833

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue39055>
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