[issue32972] unittest.TestCase coroutine support

[Karthikeyan Singaravelan]

Change by Karthikeyan Singaravelan <tir.karthi at gmail.com>:


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pull_requests: +15519
pull_request: https://github.com/python/cpython/pull/15878

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue32972>
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