> However, the 2016 edition of POSIX removed mention of LC_COLLATE from 'uniq'
Indeed. The change was done in <http://austingroupbugs.net/view.php?id=963>. Quote: "On Page: 3309 Line: 111067 Section: uniq In the ENVIRONMENT VARIABLES section, delete: LC_COLLATE Determine the locale for ordering rules." Bruno
