[docs] [issue28635] Update What's New for 3.6

[Ned Deily]

Ned Deily added the comment:

I don't see any reason to keep this open.  Thanks so much, Elvis and Yury, for doing such a great job again!

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resolution:  -> fixed
stage:  -> resolved
status: open -> closed

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue28635>
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