[issue46014] functools.singledispatch does not support Union types

[Yurii Karabas]

Change by Yurii Karabas <1998uriyyo at gmail.com>:


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pull_requests: +30343
pull_request: https://github.com/python/cpython/pull/32282

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue46014>
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