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Remove use of LiteralString in builtins (https://github.com/python/mypy/pull/21021/commits/d73039b441a2a712dd8f4ae2a2417c419821c703
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Revert Remove redundant inheritances from Iterator in builtinshttps://github.com/python/mypy/pull/21021/commits/617cedd7f2a66b2f4668702b9c75d82d019e31de
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Revert Use contravariant type variable in Containerhttps://github.com/python/mypy/pull/21021/commits/af92b04a8dd9654d60337058d751b9fbbfc14f1a
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Revert sum literal integer change (https://github.com/python/mypy/pull/21021/commits/4c6d8f3bf9375a88dd6d250fea62396693098a2c
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