For some reason I managed to get a v sign (like a check sign) next to my line numbers in IntelliJ and I have no idea how it got there. It also marks as a dark blue/black error mark on the right side.
Not only do I wanna know how to remove it because it annoys the hell out of me, but I wanna know how to turn it on again too! ;) Could come in handy some other time :)