[issue31714] Improve re documentation

[Serhiy Storchaka]

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


New changeset 69ed5b61e7d2bdaf2dc6684061f737adc24a96ae by Serhiy Storchaka in branch '3.6':
[3.6] bpo-31714: Improved regular expression documentation. (GH-3907). (#3994)
https://github.com/python/cpython/commit/69ed5b61e7d2bdaf2dc6684061f737adc24a96ae


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