Here are a few implementations that did not get the memo: coreutils ls: https://git.savannah.gnu.org/cgit/coreutils.git/log/src/ls.c https://git.savannah.gnu.o

Here are a few implementations that did not get the memo: coreutils ls: https://git.savannah.gnu.org/cgit/coreutils.git/log/src/ls.c https://git.savannah.gnu.org/cgit/coreutils.git/log/src/ls.c freebsd ls: https://github.com/freebsd/freebsd-src/commits/927f8d8bbbed70f6c88d05c19b5b366f8e7532c9/usr.bin/find/ls.c https://github.com/freebsd/freebsd-src/commits/927f8d8bbbed7... busybox ls: https://git.busybox.net/busybox/log/coreutils/ls.c https://git.busybox.net/busybox/log/coreutils/ls.c openbsd ls: https://github.com/openbsd/src/commits/master/bin/ls/ls.c https://github.com/openbsd/src/commits/master/bin/ls/ls.c The latter seems to be the most stable, yet has been updated two years ago, many years after its first introduction.