anchor.diff:  ;;;
   ;;; Instruction ASET-INSTRUCTION.
   ;;;
  -;;; This instruction takes a three inputs.  The first input is assumed
  +;;; This instruction takes three inputs.  The first input is assumed
   ;;; to be a general array.  The second is assumed to be a FIXNUM
   ;;; and represents the index in the instance of the element to be read.
   ;;; The third input is the element to be stored in the array.
  
positive.code: ;;;
  ;;; Instruction AREF-INSTRUCTION.
  ;;;
  ;;; This instruction takes a two inputs.  The first input is assumed
  ;;; to be a general array.  The second is assumed to be a FIXNUM
  ;;; and represents the index in the instance of the element to be read.
  ;;; This instruction produces a single output, the element read.
  
negative.code:     :inputs (list input1 input2 input3)
      :outputs ()
      :successors (list successor)))
  