[docs] [issue32200] Full docs build of 3.6 and 3.7 failing since 2017-10-15

[Julien Palard]

Change by Julien Palard <julien+python at palard.fr>:


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nosy: +jfbu

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue32200>
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