Fix comment in revert_arc #70

Job	Run time
stylecheck	33s
build-debug	30m 14s
build-opensuse (all)	28m 3s
build-opensuse (horizon.so)	4m 54s
build-arch (all)	21m 11s
build (ubuntu:focal, g++, gcc, all)	26m 37s
build-pr-review	6m 20s
build-arch (horizon.so)	5m 53s
build (ubuntu:focal, g++, gcc, horizon.so)	9m 29s
build (ubuntu:jammy, g++, gcc, all)	22m 2s
build (ubuntu:jammy, g++, gcc, horizon.so)	5m 58s
build (ubuntu:lunar, g++, gcc, all)	25m 52s
build (ubuntu:lunar, g++, gcc, horizon.so)	8m 48s
build (debian:bullseye, g++, gcc, all)	23m 4s
build (debian:bullseye, g++, gcc, horizon.so)	6m 41s
build (debian:bookworm, clang, clang, all)	25m 16s
build (debian:bookworm, clang, clang, horizon.so)	5m 31s
build (debian:bookworm, g++, gcc, all)	26m 40s
build (debian:bookworm, g++, gcc, horizon.so)	4m 40s
	4h 47m 46s

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