Newtonian Simulator Fixes and Cleanup #628

Job	Run time
test (3.8, ubuntu-latest, test)	7m 5s
test (3.8, ubuntu-latest, test-full)	7m 23s
test (3.8, windows-latest, test)	7m 9s
test (3.8, windows-latest, test-full)	7m 6s
test (3.9, ubuntu-latest, test)	6m 46s
test (3.9, ubuntu-latest, test-full)	7m 1s
test (3.9, windows-latest, test)	38s
test (3.9, windows-latest, test-full)	13s
test (3.10, ubuntu-latest, test)	6m 56s
test (3.10, ubuntu-latest, test-full)	7m 23s
test (3.10, windows-latest, test)	7m 8s
test (3.10, windows-latest, test-full)	7m 7s
test (3.11, ubuntu-latest, test)	6m 22s
test (3.11, ubuntu-latest, test-full)	7m 23s
test (3.11, windows-latest, test)	7m 11s
test (3.11, windows-latest, test-full)	7m 11s
test (3.12, ubuntu-latest, test)	7m 4s
test (3.12, ubuntu-latest, test-full)	7m 20s
test (3.12, windows-latest, test)	7m 9s
test (3.12, windows-latest, test-full)	7m 10s
check-format / check	14s
	2h 8m 59s

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