src/test/ui/parser/bad-escape-suggest-raw-string.rs

   1 fn main() {
   2     let ok = r"ab\[c";
   3     let bad = "ab\[c";
   4     //~^ ERROR unknown character escape: `[`
   5     //~| HELP for more information, visit <https://static.rust-lang.org/doc/master/reference.html#literals>
   6     //~| HELP if you meant to write a literal backslash (perhaps escaping in a regular expression), consider a raw string literal
   7 }