[docs] [issue35564] [DOC] Sphinx 2.0 will require master_doc variable set in conf.py

[jfbu]

jfbu <jfbu at free.fr> added the comment:

sorry for previous message whose text mentioned the GitHub pull request number but this links to bpo issue of that number, of course completely unrelated

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pull_requests: +10525

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue35564>
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