replace todo with fixme

crates/ra_syntax/src/validation/char.rs

@@ -85,7 +85,7 @@ pub(super) fn is_ascii_escape(code: char) -> bool {
 fn validate_ascii_code_escape(text: &str, range: TextRange, errors: &mut Vec<SyntaxError>) {
     // An AsciiCodeEscape has 4 chars, example: `\xDD`
     if !text.is_ascii() {
-        // TODO: Give a more precise error message (say what the invalid character was)
+        // FIXME: Give a more precise error message (say what the invalid character was)
         errors.push(SyntaxError::new(AsciiCodeEscapeOutOfRange, range));
     } else if text.chars().count() < 4 {
         errors.push(SyntaxError::new(TooShortAsciiCodeEscape, range));