anchor.diff:  
   
   COMMENT
  -   : '*' ~[\r\n]*
  +   : '*' ~ [\r\n]*
      ;
   
   
  
positive.code:    ;
  
  lin
      : line? EOL;
  
  line
     : (label? subject pattern? EQ expression+ (COLON transfer)?)
     | (COLON transfer)
     | COMMENT 
     | END
     ;
  
  label
  
negative.code:    : ':'
     ;
  
  
  END
     : 'END'
     ;
  
  
  STRINGLITERAL1
     : '"' ~ ["\r\n]* '"'
     ;
  
  
  STRINGLITERAL2
     : '\'' ~ [\'\r\n]* '\''
     ;
  
  
  