[docs] [issue36947] Fix 3.3.3.1 Metaclasses Documentation

[Stéphane Wirtel]

Stéphane Wirtel <stephane at wirtel.be> added the comment:

Thank you for your report

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assignee:  -> docs at python
components: +Documentation
nosy: +docs at python, matrixise

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue36947>
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