If it really bothers you, you can kill two birds with one stone. There's no need to replace the hose for one little divot. Just buy a radiator hose splice, cut the hose, and join it back together with the splice kit. Make it a metal splice where the metal will be resting on the rib, and you'll never have this issue ever again.
By the way; I'd imagine that it would be a small obvious leak far before it suddenly busts, spewing hot coolant and steam all over. Who would ignore such an obvious leak?