Yes, I've tested it with the GUI and I've seen the comment in the code not to change the format. The format is the same for the 'list' command as "region_found" and "vars->match_to_region" are always false there. I just broke the line length down a little bit.
Only the new 'rlist' command has a different (extended) format the GUI doesn't use, yet.
Is it okay for you this way?