[docs] [issue31943] Add asyncio.Handle.cancelled() method

[Marat Sharafutdinov]

Change by Marat Sharafutdinov <decaz89 at gmail.com>:


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title: Add asyncio.Handle.cancelled() and asyncio.TimerHandle.when -> Add asyncio.Handle.cancelled() method

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue31943>
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