[TxMt] Source.tmbundle "Continue line comment" snippet

Sorry for being stupid, but could someone please tell me what the -^- character that's the default keyboard shortcut for the Continue line comment snippet in the Source bundle actually corresponds to on the keyboard? It's #^C (as in the actual single character '^C', not '^' followed by 'C') as rendered by less on the ascii plist. I've made a number of educated guesses, but all to no avail. This is just making me feel stupid. I could rebind it, but my experience has generally been that the defaults for things like this are actually quite clever, and I like to know what they are before choosing something else.

Thanks. -jrk