<C-n> flip fix #623

Job	Run time
build (ubuntu-latest)	2m 42s
build (ubuntu-latest, --disable-curses)	2m 43s
build (ubuntu-latest, --disable-lua)	2m 29s
build (ubuntu-latest, --disable-tre)	3m 4s
build (ubuntu-latest, --disable-selinux)	2m 40s
build (ubuntu-latest, --disable-acl)	2m 43s
build (ubuntu-latest, --disable-help)	2m 59s
build (ubuntu-20.04)	2m 40s
build (ubuntu-20.04, --disable-curses)	2m 40s
build (ubuntu-20.04, --disable-lua)	2m 29s
build (ubuntu-20.04, --disable-tre)	2m 40s
build (ubuntu-20.04, --disable-selinux)	2m 40s
build (ubuntu-20.04, --disable-acl)	2m 43s
build (ubuntu-20.04, --disable-help)	2m 41s
	37m 53s

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