[docs] [issue11681] -b option undocumented

New submission from Éric Araujo merwok@netwok.org:

Python 2 has a -b command-line option which is undocumented.

It is used by the warnings machinery to decide to warn about (-b) or raise an error (-bb) if someone uses str(bytes) or str(buffer) (explanation courtesy of grep and Python/pythonrun.c).

---------- assignee: docs@python components: Documentation keywords: easy messages: 132195 nosy: docs@python, eric.araujo priority: normal severity: normal stage: needs patch status: open title: -b option undocumented versions: Python 2.7

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