fix Comment spec for "@all" mentions
fix Comment spec for "@all" mentions

broken in de21db9

crewmate/crewmate,teambox/teambox,crewmate/crewmate,codeforeurope/samenspel,vveliev/teambox,ccarruitero/teambox,rahouldatta/teambox,vveliev/teambox,codeforeurope/samenspel,vveliev/teambox,crewmate/crewmate,wesbillman/projects,irfanah/teambox,teambox/teambox,irfanah/teambox,irfanah/teambox,ccarruitero/teambox,alx/teambox,nfredrik/teambox,nfredrik/teambox,vveliev/teambox,wesbillman/projects,alx/teambox,nfredrik/teambox,nfredrik/teambox,rahouldatta/teambox,rahouldatta/teambox,irfanah/teambox,teambox/teambox