emanuele6 1718507857 learn Commands that don't have options specified by POSIX generally lack the  "The ... shall support XBD Utility Syntax Guidelines."  line in their description, so they are not required to support "--".
emanuele6 1721520620 forget
emanuele6 1721522771 learn Shell special built-ins that don't have options specified by POSIX are not required to accept "--" as end of options marker.