Tweak username-should-not-be-email error message
Tweak username-should-not-be-email error message

probil/codecombat,fabichoi/codecombat,jeremyprice/codecombat,Zerrien/codecombat,jeremyprice/codecombat,fabichoi/codecombat,jeremiahyan/codecombat,codecombat/codecombat,VilkkuV/codecombat,VilkkuV/codecombat,jeremyprice/codecombat,fabichoi/codecombat,javatlacati/codecombat,codecombat/codecombat,javatlacati/codecombat,probil/codecombat,kidaa/codecombat,icodegame/codecombat,probil/codecombat,javatlacati/codecombat,jeremiahyan/codecombat,icodegame/codecombat,jeremyprice/codecombat,icodegame/codecombat,kidaa/codecombat,kidaa/codecombat,Zerrien/codecombat,codecombat/codecombat,probil/codecombat,VilkkuV/codecombat,jeremiahyan/codecombat,Zerrien/codecombat,jeremiahyan/codecombat,codecombat/codecombat,codecombat/codecombat,kidaa/codecombat,fabichoi/codecombat,javatlacati/codecombat,VilkkuV/codecombat,Zerrien/codecombat,javatlacati/codecombat,icodegame/codecombat