[issue41224] Document is_annotate() in symtable and update doc strings

[Serhiy Storchaka]

Serhiy Storchaka <storchaka+cpython at gmail.com> added the comment:


New changeset 2edfc86f69d8a74f4821974678f664ff94a9dc22 by Andre Delfino in branch 'master':
bpo-41224: Add versionadded for Symbol.is_annotated (GH-23861)
https://github.com/python/cpython/commit/2edfc86f69d8a74f4821974678f664ff94a9dc22


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nosy: +serhiy.storchaka

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