Simplified quick_abort_pct code and improved its docs #171

Job	Run time
build-tests(ubuntu-22.04,gcc,default)	5m 43s
source-maintenance-tests	2m 56s
build-tests(ubuntu-22.04,gcc,minimal)	4m 16s
CodeQL-tests	23m 55s
functionality-tests	17m 29s
build-tests(ubuntu-22.04,gcc,maximus)	6m 1s
build-tests(ubuntu-22.04,clang,default)	6m 25s
build-tests(ubuntu-22.04,clang,minimal)	5m 0s
build-tests(ubuntu-22.04,clang,maximus)	6m 48s
	1h 18m 33s

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