3.6.3

.. bpo: 31641 .. date: 2017-10-03-01-05-11 .. nonce: vlQEq5 .. release date: 2017-10-03 .. section: Library

Re-allow arbitrary iterables in concurrent.futures.as_completed(). Fixes regression in 3.6.3rc1.

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.. bpo: 31662 .. date: 2017-10-03-01-06-24 .. nonce: 8l2jEz .. section: Build

Fix typos in Windows uploadrelease.bat script. Fix Windows Doc build issues in Doc/make.bat.

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.. bpo: 31423 .. date: 2017-10-03-01-01-52 .. nonce: uKvPYA .. section: Build

Fix building the PDF documentation with newer versions of Sphinx.