[boost] filesystem doc nit

"The Filesystem Library's fstream.hpp header simply uses the <fstream> standard library components as base classes, and then overrides the members requiring argument types of path." Technically, I don't think this is overriding, and the base classes don't require path arguments. Maybe you mean: "The Filesystem Library's fstream.hpp header simply uses the <fstream> standard library components as base classes, and then adds constructors, and overloads of the base interfaces, that accept path arguments instead of strings" -- Dave Abrahams Boost Consulting www.boost-consulting.com