[docs] [issue22630] `concurrent.futures.Future.set_running_or_notify_cancel` does not notify cancel

[Ben Mather]

Changes by Ben Mather <bwhmather at bwhmather.com>:


Added file: http://bugs.python.org/file36910/change-docs-and-waiters.patch

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue22630>
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