Lint

Add clarifying comment and test for unknown target in VuMark generati… #7402

Job	Run time
build (3.13, windows-latest, pre-push)	4m 16s
build (3.13, windows-latest, pre-commit)	2m 22s
build (3.13, ubuntu-latest, pre-commit)	53s
build (3.13, ubuntu-latest, manual)	48s
build (3.13, ubuntu-latest, pre-push)	3m 7s
build (3.13, windows-latest, manual)	1m 35s
completion-lint	3s
	13m 4s

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