{"ast_node_type":"other","tokens":[{"end":91,"kind":"keyword","start":0,"text":"unicode_chars::check_for_substitution(self,"}]}
                        unicode_chars::check_for_substitution(self, start, c, repeats + 1);
                    let (token, sugg) =
                    self.dcx().emit_err(errors::UnknownTokenStart {