[issue36541] Make lib2to3 grammar better match Python, support the := walrus

[miss-islington]

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


New changeset 06bfd033e847bedb6e123d131dcf46393a4555df by Miss Islington (bot) in branch '3.8':
bpo-36541: Add lib2to3 grammar PEP-570 pos-only arg parsing (GH-23759)
https://github.com/python/cpython/commit/06bfd033e847bedb6e123d131dcf46393a4555df


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