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

[miss-islington]

miss-islington <mariatta.wijaya+miss-islington at gmail.com> added the comment:


New changeset cee95fe1825dfeb52d7074c8209b5884a079f06c by Miss Islington (bot) in branch '3.7':
bpo-36739: Update controlflow.rst (GH-12983)
https://github.com/python/cpython/commit/cee95fe1825dfeb52d7074c8209b5884a079f06c


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<https://bugs.python.org/issue36739>
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