tests/ui/diagnostic-width/whitespace-trimming-2.rs - third_party/github.com/rust-lang/rust - Git at Google

 // ignore-tidy-linelength

 fn foo() -> usize {
                                                                                                                                                                                           ()
 //~^ ERROR mismatched types
 }

 fn main() {}
	// ignore-tidy-linelength

	fn foo() -> usize {
	()
	//~^ ERROR mismatched types
	}

	fn main() {}