Error messages don't follow style convention of Trait<Type = T>

[clarfonthey]

Currently, rustfmt modifies these statements to include a space around the equal sign, but error messages don't do this. I'd appreciate if this were changed to follow rustfmt because I use Fira Code which converts =< into a ligature for ≤, and statements like the below format awkwardly:

std::ops::Index<std::ops::RangeFrom<usize>, Output=<T as strlike::StrLike>::Data>

[GuillaumeGomez]

Fixing it.

[GuillaumeGomez]

Actually that'd be nice to have an error code to starting working on (so that I can get a start point to fix others as well).

[GuillaumeGomez]

I did it first in rustdoc.

[clarfonthey]

So I actually don't remember what specific errors this was for, but on the latest nightly:

trait Test {
    type Assoc;
}
impl<T> Test for [T] {
    type Assoc = T;
}
fn test<T: Test<Assoc = u8>>(iter: &T) {}

fn main() {
    test(&[0i32][..])
}

I get:

...
error[E0271]: type mismatch resolving `<[i32] as Test>::Assoc == u8`
...

So I'm going to close this.