Deploy the (limited) documentation we have to RTD

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Feature request type

• Suppress false positives from existing pylint warnings
• Add new pytest-specific warning
• Other

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https://github.com/sphinx-doc/sphinx/blob/master/Makefile#L59-L63

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Also https://docs.readthedocs.io/en/stable/guides/pull-requests.html?