[issue20361] -W command line options and PYTHONWARNINGS environmental variable should not override -b / -bb command line options

[Nick Coghlan]

Change by Nick Coghlan <ncoghlan at gmail.com>:


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pull_requests: +4647
stage: needs patch -> patch review

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue20361>
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