[3.6] bpo-30449 Terse slots (GH-1819) by miss-islington · Pull Request #5815 · python/cpython

@aaronchall @miss-islington

* correct __slots__ documentation with minimal changes

* add multiple inheritance info

* remove mapping from description
(cherry picked from commit 2b44e30)

Co-authored-by: Aaron Hall, MBA <aaronchall@yahoo.com>

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Feb 22, 2018