Uppercase DECRPTUI hex response
Other terminals (VTE, Terminology) send the DECRPTUI hex response to DA3 in uppercase, Christian Persch's esctest fork (https://gitlab.gnome.org/chpe/esctest/) expects uppercase.
Other terminals (VTE, Terminology) send the DECRPTUI hex response to DA3 in uppercase, Christian Persch's esctest fork (https://gitlab.gnome.org/chpe/esctest/) expects uppercase.