Missing `::` on editor hover tip

[EFanZh]

See this screenshot:

I expect the hover tip shows fn foo() -> crate::X, but I got fn foo() -> crateX, the :: is missing.

[lnicola]

Also

struct X;

mod m {
    fn foo() -> super::X {
        X
    }
}

fn main() {
    m::foo()
}