anchor.diff:                    (t (call-next-method))))))
         (call-next-method)))
   
  -(defmethod display-parse-tree ((parser-symbol literal-object-lexeme) stream (drei drei)
  +(defmethod display-parse-tree ((parser-symbol literal-object-form) stream (drei drei)
                                  (syntax lisp-syntax))
     (updating-output
         (stream :unique-id (list drei parser-symbol)
  
positive.code: (defclass bit-vector-form (form-lexeme complete-form-mixin) ())
  (defclass number-lexeme (form-lexeme complete-form-mixin) ())
  (defclass token-mixin () ())
  (defclass literal-object-lexeme (form-lexeme) ())
  (defclass complete-token-lexeme (token-mixin form-lexeme complete-form-mixin) ())
  (defclass multiple-escape-start-lexeme (lisp-lexeme) ())
  (defclass multiple-escape-end-lexeme (lisp-lexeme) ())
  
negative.code: 	(t (cond ((or (constituentp object)
                        (eql object #\\))
                    (lex-token syntax scan))
                   (t (fo) (make-instance 'literal-object-form))))))))
  
  (defmethod lex ((syntax lisp-syntax) (state lexer-list-state) scan)
    (macrolet ((fo () `(forward-object scan)))
  