anchor.diff:  How to use
   ----------
   
  -1. Read the documentation in lisp-unit.html.
  +1. Read the documentation in lisp-unit.html, at
  +http://www.cs.northwestern.edu/academics/courses/325/readings/lisp-unit.html
   
   2. Make a file of DEFINE-TEST's. See exercise-tests.lisp for many
   examples. If you want, start your test file with (REMOVE-TESTS) to
  
positive.code: ;;;-*- Mode: Lisp; Package: LISP-UNIT -*-
  
  #|
  Copyright (c) 2004-2005 Christopher K. Riesbeck
  
negative.code: 
  2. Load this file.
  
  2. (use-package :tap-unit-test)
  
  3. Load your code file and your file of tests.
  
  