Commit Briefs
use mergesort(3) instead of qsort(3) in patience diff
Fixes test failures on OpenBSD due to unstable results of qsort if two or more elements are equal. Add a compat copy of OpenBSD mergesort(3) for Linux.
Fixes test failures on OpenBSD due to unstable results of qsort if two or more elements are equal. Add a compat copy of OpenBSD mergesort(3) for Linux.