message: Remove unrelated change and fix typo
diff: @@ -226,7 +226,7 @@ export const createRegExpParser = createParser((ParserCore) =>
  case 'x':
  {
  - const possibleHex = input.slice(get0(index) + 1, get0(index) + 2);
  + const possibleHex = input.slice(get0(index) + 1, 2);
  // \xhh
  if (possibleHex.length === 2 && isHex(possibleHex)) {
  @@ -536,7 +536,7 @@ export const createRegExpParser = createParser((ParserCore) =>
  if (token.type === 'NumericBackReferenceCharacter') {
  this.nextToken();
  const value = token.value;
  - // \8 \9 are treated escape char
  + // \8 \9 are treated as escape char
  if (value === 8 || value === 9) {
  return {
  type: 'RegExpCharacter',
  