[issue40257] Improve the use of __doc__ in pydoc

[Emmanuel Arias]

Change by Emmanuel Arias <eamanu at yaerobi.com>:


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nosy: +eamanu
nosy_count: 11.0 -> 12.0
pull_requests: +21452
pull_request: https://github.com/python/cpython/pull/22390

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue40257>
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