Tests

Make the space in error comments optional #21041

Job	Run time
Test mypyc suite with 32-bit Python	9m 44s
Test suite with py313-ubuntu, mypyc-compiled	14m 28s
Parallel tests with py314-ubuntu, mypyc-compiled	29m 38s
Test suite with py311-ubuntu	8m 46s
Test suite with py310-ubuntu, mypyc-compiled	14m 59s
mypyc runtime tests with py313-macos	6m 5s
Test suite with py314-ubuntu, mypyc-compiled	13m 43s
Test suite with py314t-ubuntu, mypyc-compiled	16m 40s
mypyc runtime tests with py310-ubuntu	5m 36s
Parallel tests with py314-windows-64, interpreted	9m 39s
Test suite with py314-windows-64	26m 28s
Parallel tests with py314-ubuntu, interpreted	22m 55s
Test suite with py312-ubuntu	8m 48s
Type check our own code (py310-ubuntu)	1m 39s
Formatting and code style with Black + ruff	1m 40s
Type check our own code (py310-windows-64)	2m 30s
	3h 13m 18s

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