[docs] [issue32471] Add an UML class diagram to the collections.abc module documentation

[Yahya Abou Imran]

Change by Yahya Abou Imran <yahya-abou-imran at protonmail.com>:


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keywords: +patch
pull_requests: +4994
stage:  -> patch review

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue32471>
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