rustfmt changes return type of loop and causes code to not compile

Most basic example:

fn main() {
    loop {
        break false
    };
}

This just runs and does nothing.

If you run rustfmt it yields

fn main() {
    loop {
        break false;
    }
}

This now fails to compile

Compiling playground v0.0.1 (/playground)
error[[E0308]](https://doc.rust-lang.org/stable/error-index.html#E0308): mismatched types
 --> src/main.rs:3:15
  |
3 |         break false;
  |               ^^^^^ expected `()`, found `bool`

For more information about this error, try `rustc --explain E0308`.
error: could not compile `playground` due to previous error