Missing definitions for typing_extensions

[taasan]

Bug Report

Missing definitions in typeshed. They have been added to upstream typeshed.

To Reproduce

mypy -c 'from typing_extensions import assert_never, Never'

Expected Behavior

Type checking should succeed

Actual Behavior

<string>:1: error: Module "typing_extensions" has no attribute "assert_never"
<string>:1: error: Module "typing_extensions" has no attribute "Never"
Found 2 errors in 1 file (checked 1 source file)

Your Environment

• Mypy version used: Tried both 0.921 (from fedora) and 0.941
• Mypy command-line flags:
• Mypy configuration options from mypy.ini (and other config files):
• Python version used: 3.10
• Operating system and version: Fedora 35

[hauntsaninja]

Will be included in the next release, presumably from #12321