mypy

gh-123446: Fix empty function names in `TypeError`s in `_csv` module … #79

Job	Run time
Run mypy on Lib/_pyrepl	14s
Run mypy on Lib/test/libregrtest	15s
Run mypy on Tools/build	13s
Run mypy on Tools/cases_generator	14s
Run mypy on Tools/clinic	16s
Run mypy on Tools/jit	19s
Run mypy on Tools/peg_generator	18s
Run mypy on Tools/wasm	14s
	2m 3s

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