Returning a lifetime-less reference is confusing

[huonw]

E.g. http://rustbyexample.com/examples/tuples/README.html

fn chimpanzees() -> (int, &str) {

should really be &'static str. It's actually a bug (rust-lang/rust#2478) that not having the lifetime is even possible. (The compiler inserts anonymous lifetimes where they are missing, but 'static is the super-lifetime of everything, including these anonymous ones, so the &'static str string literals satisfy the return type.)