[docs] [issue36597] Travis CI: doctest failure

[Inada Naoki]

Inada Naoki <songofacandy at gmail.com> added the comment:


New changeset ac31da8f3710f9f9b8dbb4c36b2108fb1e5b4a48 by Inada Naoki in branch '3.7':
bpo-36597: fix random doctest failure (GH-12778)
https://github.com/python/cpython/commit/ac31da8f3710f9f9b8dbb4c36b2108fb1e5b4a48


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