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[3.13] gh-149410: Test that `typing.NoDefault` is final (GH-149411) (#149420)

gh-149410: Test that `typing.NoDefault` is final (GH-149411)
(cherry picked from commit bad9296fb0424bc480fa0ecfd2d60f73c33358f5)

Co-authored-by: sobolevn <mail@sobolevn.me>
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Miss Islington (bot) committed
99c9b85ad8f07041a07a3b2b2da4696a00409aff
Parent: 67c47ce
Committed by GitHub <noreply@github.com> on 5/5/2026, 3:22:48 PM