Nicks containing `^` are not pilled in IRC->Matrix messages

[progval]

On IRC:

10:30:45 --> val-m (@pinkie:matrix.org) (~pinkiemat@2001:470:69fc:105::dcfc) has joined #valtest2
12:59:49 <@val> foo val-m, val-m bar
13:00:15 -- val-m is now known as val^
13:00:24 <@val> foo val^, val^ bar
13:00:43 -- val^ is now known as val^m
13:00:45 <@val> foo val^m, val^m bar

on Element:

(Nick was changed by PMing !nick to the appservice bot)