[docs] [issue34839] doctest: Change example under warnings section

[Julien Palard]

Julien Palard <julien+python at palard.fr> added the comment:


New changeset 0522fd81dc6e3482c2d4c8719f1f85ad5924eede by Julien Palard (Stéphane Wirtel) in branch 'master':
bpo-34839: Add a 'before 3.6' in the section 'warnings' of doctest (GH-9736)
https://github.com/python/cpython/commit/0522fd81dc6e3482c2d4c8719f1f85ad5924eede


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nosy: +mdk

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