Simplified quick_abort_pct code and improved its docs #168

Job	Run time
source-maintenance-tests	2m 50s
functionality-tests	17m 21s
CodeQL-tests	23m 48s
build-tests(ubuntu-22.04,gcc,default)	5m 25s
build-tests(ubuntu-22.04,gcc,minimal)	4m 7s
build-tests(ubuntu-22.04,gcc,maximus)	5m 59s
build-tests(ubuntu-22.04,clang,default)	6m 19s
build-tests(ubuntu-22.04,clang,minimal)	5m 2s
build-tests(ubuntu-22.04,clang,maximus)	7m 0s
	1h 17m 51s

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