Merge pull request #759 from googlefonts/marks-cleanup #2124

Job	Run time
Rustfmt	1m 20s
Clippy lints	1m 37s
cargo check no std	1m 53s
Build GS and check the result	3m 33s
resources/scripts/ots_test.sh	1m 42s
cargo test fea-rs	1m 27s
fontbe tests	1m 20s
fontc tests	1m 56s
tests other than fontbe,fontc	2m 3s
	16m 51s

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