anchor.diff:  returns [StringBuilder text]
   @init {
       StringBuilder t = new StringBuilder();
  -    String sep = " ";
  -    String end = " )";
  -    t.append( "enum (" );
  +    String sep = _SPACE;
  +    String end = _SPACE + _RPAREN;
  +    t.append( _ENUM + _SPACE + _LPAREN );
   }
   @after {
       t.append( end );
  
positive.code:                                   t.append( getText( $description.text ) );
                                    t.append( getTab() );
                                    String st_type = getText( $stateType.text );
                                    if ( !st_type.equals("") ) {
                                        t.append( st_type + SPACE );
                                    }
                                    t.append( "state " );
                                    t.append( getText( $stateName.text ) );
                                    t.append( SPACE );
                                    t.append( getText( $parameterList.text ) );
                                    t.append( ";" + NEWLINE );
                                    t.append( getText( $pragmaList.text ) );
                                }
                                ;
  
negative.code:                                  )                          
                                {
                                    t.append( getText( $relationshipSpec.text ) );
                                    t.append( _DOT );
                                    t.append( getText( $attributeName.text ) );
                                }
                                ;
  