[issue44796] Add __parameters__ and __getitem__ in TypeVar and ParamSpec

[Serhiy Storchaka]

Change by Serhiy Storchaka <storchaka+cpython at gmail.com>:


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Removed message: https://bugs.python.org/msg398655

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue44796>
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