anchor.diff:     *         normalFormalParameter (':' expression)?
      */
     FormalParameter parseFormalParameter(ParameterKind kind,
  -      {bool inFunctionType = false}) {
  +      {bool inFunctionType: false}) {
       NormalFormalParameter parameter =
           parseNormalFormalParameter(inFunctionType: inFunctionType);
       TokenType type = _currentToken.type;
  
positive.code:    * [leftParenthesis]. Return the formal parameters that were parsed.
     */
    FormalParameterList _parseFormalParameterListAfterParen(Token leftParenthesis,
        {bool inFunctionType = false}) {
      if (_matches(TokenType.CLOSE_PAREN)) {
        return astFactory.formalParameterList(
            leftParenthesis, null, null, null, getAndAdvance());
  
negative.code:    *       | metadata identifier
     */
    NormalFormalParameter parseNormalFormalParameter(
        {bool inFunctionType: false}) {
      CommentAndMetadata commentAndMetadata = parseCommentAndMetadata();
      FinalConstVarOrType holder = parseFinalConstVarOrType(!inFunctionType,
          inFunctionType: inFunctionType);
  