[issue44791] Substitution of ParamSpec in Concatenate

[Serhiy Storchaka]

Serhiy Storchaka <storchaka+cpython at gmail.com> added the comment:

My understanding is that type expression is valid when substitute TypeVar and parameters expression is valid when substitute ParamSpec.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue44791>
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