anchor.diff:  line
       : cmd+ comment?
       | comment
  +    | print
       | procedureDeclaration
       ;
        
  
positive.code:     : STRING
      ;
  
  stringliteral
      : '"' STRING
      ;
  
  value
      : stringliteral
      | expression
      | deref 
      ;
  
negative.code:     ;
  
  make
      : 'make' STRINGLITERAL value
      ;
  
  print
  