tests/ui/fmt/format-raw-string-error.rs - rust-lang/rust - Git at Google

 fn main() {
     println!(r#"\'\'\'\'\'\'\'\'\'\'\'\'\'\'}"#); //~ ERROR invalid format string: unmatched `}` found
 }
	fn main() {
	println!(r#"\'\'\'\'\'\'\'\'\'\'\'\'\'\'}"#); //~ ERROR invalid format string: unmatched `}` found
	}