Testing and Validation

Small stylistic fixes and add `pre-commit` config #1290

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Run time

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Job	Run time
test_unit_ubuntu_latest (3.8)	2m 42s
test_unit_ubuntu_latest (3.9)	5m 33s
test_unit_ubuntu_latest (3.10)	2m 53s
test_unit_ubuntu_latest (3.11)	4m 48s
	15m 56s