mypy

GH-142646: Update Tachyon to use backtick formatting in CLI help (#14… #9941

Job	Run time
Run mypy on Tools/build	20s
Run mypy on Lib/_pyrepl	20s
Run mypy on Tools/cases_generator	18s
Run mypy on Lib/test/libregrtest	22s
Run mypy on Tools/clinic	19s
Run mypy on Tools/jit	20s
Run mypy on Lib/tomllib	18s
Run mypy on Tools/peg_generator	21s
	2m 38s

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