[issue36739] "4.6. Defining Functions" should mention nonlocal

[Peter Bauer]

Change by Peter Bauer <p-bauer-it at t-online.de>:


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keywords: +patch
pull_requests: +12908
stage: needs patch -> patch review

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue36739>
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