Quickie: Kile LaTeX Editor - Shortcut for commenting

Ok this is something real quick, and I had a hard time finding for some reason. Every now and then when trying to save in Kile by pressing Ctrl+S I would accidentally hit something else and comment the line, which is a nice trick/shortcut to know but I couldn't figure out what I had hit. It is in fact Ctrl+D. To uncomment press Ctrl+Shft+D.