mypy

gh-142939: difflib.get_close_matches performance (#142940) #10004

Job	Run time
Run mypy on Tools/jit	19s
Run mypy on Lib/tomllib	19s
Run mypy on Lib/test/libregrtest	18s
Run mypy on Tools/check-c-api-docs	20s
Run mypy on Lib/_pyrepl	20s
Run mypy on Tools/cases_generator	23s
Run mypy on Tools/clinic	20s
Run mypy on Tools/build	18s
Run mypy on Tools/peg_generator	20s
	2m 57s

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