Minor fixups and linting #530

Job	Run time
pip (ubuntu-latest, cpu)	1m 29s
conda (ubuntu-latest, nvidia)	6m 52s
pip (windows-latest, cpu)	7m 46s
conda (ubuntu-latest, cpu)	4m 20s
pip (windows-latest, directml)	8m 3s
conda (macos-latest, nvidia)	13m 12s
conda (macos-latest, cpu)	16m 40s
conda (windows-latest, nvidia)	12m 42s
conda (windows-latest, cpu)	14m 57s
conda (ubuntu-latest, rocm)	5m 4s
conda (windows-latest, directml)	11m 4s
	1h 42m 9s

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