refactor: do not write out modified specs #250

Job	Run time
Run linting and unit tests (3.8, 3.8-slim-buster, 4.2, 12345)	3m 23s
Run linting and unit tests (3.8, 3.8-slim-buster, 4.4, 12345)	3m 17s
Run linting and unit tests (3.8, 3.8-slim-buster, 5.0, 12345)	3m 25s
Run linting and unit tests (3.9, 3.9-slim-buster, 4.2, 12345)	3m 20s
Run linting and unit tests (3.9, 3.9-slim-buster, 4.4, 12345)	3m 21s
Run linting and unit tests (3.9, 3.9-slim-buster, 5.0, 12345)	3m 26s
Run linting and unit tests (3.10, 3.10-slim-buster, 4.2, 12345)	2m 31s
Run linting and unit tests (3.10, 3.10-slim-buster, 4.4, 12345)	2m 32s
Run linting and unit tests (3.10, 3.10-slim-buster, 5.0, 12345)	2m 39s
Docker (3.8, 3.8-slim-buster)	1m 17s
Docker (3.9, 3.9-slim-buster)	1m 24s
Docker (3.10, 3.10-slim-buster, latest)	1m 20s
	31m 55s

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