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Update setuptools.readthedocs.io to setuptools.pypa.io
Merge https://github.com/pypa/distutils into distutils-e8eb87855
Get rid of trailing spaces, mainly in docs
Merge with pypa/distutils@f3b225449
Move distutils docs into 'deprecated' section and link them from that section.
Merge https://github.com/pypa/distutils into distutils-fac564f
Merge https://github.com/pypa/distutils into feature/distutils-sync