The French can't fight? Don't tell that to The Three Musketeers. "All for one, one for all."As far as literary one-liners go, that's pretty far up there on the recognition scale. Indeed, the idea of the three musketeers, three compatriots, is one which has permeated the cultural language fairly consistently. How many times has a group of three American friends, usually children, been dubbed such?... ...