message: Follow up from previous change to avoid setting tokStart 2x.
diff: @@ -62,8 +62,6 @@ Token Lexer::emitError(const char *loc, const Twine &message) {
  }
  Token Lexer::lexToken() {
  - const char *tokStart = curPtr;
  -
  // Ignore whitespace.
  while (curPtr) {
  switch (*curPtr) {
  @@ -76,10 +74,10 @@ Token Lexer::lexToken() {
  default:
  break;
  }
  - tokStart = curPtr;
  break;
  }
  + const char *tokStart = curPtr;
  switch (*curPtr++) {
  default:
  // Handle bare identifiers.
  