[issue40707] Popen.communicate documentation does not say how to get the return code

[Gareth Rees]

Change by Gareth Rees <gdr at garethrees.org>:


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keywords: +patch
pull_requests: +19559
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/20283

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue40707>
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