[issue30398] Add a docstring for re.error

[Serhiy Storchaka]

Serhiy Storchaka added the comment:


New changeset 12d6b5d156377c0877931a03ef2439dccb2f3711 by Serhiy Storchaka in branch 'master':
bpo-30398: Add a docstring for re.error. (#1647)
https://github.com/python/cpython/commit/12d6b5d156377c0877931a03ef2439dccb2f3711


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