error: unknown character escape: `[` --> $DIR/bad-escape-suggest-raw-string.rs:3:19 | LL | let bad = "ab\[c"; | ^ unknown character escape | = help: for more information, visit help: if you meant to write a literal backslash (perhaps escaping in a regular expression), consider a raw string literal | LL | let bad = r"ab\[c"; | ~~~~~~~~ error: aborting due to 1 previous error