[docs] [issue19820] docs are missing info about module attributes

[Michael Anckaert]

Change by Michael Anckaert <michael.anckaert at sinax.be>:


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keywords: +patch
pull_requests: +15071
stage: needs patch -> patch review
pull_request: https://github.com/python/cpython/pull/15359

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue19820>
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