anchor.diff:          (cond ((> a 0) :positive)
                 ((< a 0) :negative)
                 (t :zero)))
  -  (assert-equal ____ c))
  +  (assert-equal :positive c))
  
positive.code:                 (5 :five)
                  ;; t specifies default behavior
                  (t :unknown)))
    (assert-equal ____ b)
    "case can also check if a list of values contains
     the input"
    (setf c
  
negative.code:          (lastname (case name ("John" "Doe")
                                ("Max" "Mustermann")
                                (t "Anonymous"))))
    (assert-equal "Anonymous" lastname)))
  
  (define-test test-cond
      "cond is the general purpose form for checking multiple
  