anchor.diff:              (loop for letter in letters by #'cddr collect letter))
              (loop-result-in-cdddr
               (loop for letter in letters by #'cdddr collect letter)))
  -      (assert-equal loop-result-in ____)
  -      (assert-equal loop-result-in-cdr ____)
  -      (assert-equal loop-result-in-cddr ____)
  -      (assert-equal loop-result-in-cdddr ____)))
  +      (assert-equal loop-result-in '(:a :b :c :d :e :f))
  +      (assert-equal loop-result-in-cdr '(:a :b :c :d :e :f))
  +      (assert-equal loop-result-in-cddr '(:a :c :e))
  +      (assert-equal loop-result-in-cdddr '(:a :d))))
   
   
   (define-test test-loop-across-vector
       (let* ((my-vector (make-array '(5) :initial-contents '(0 1 2 3 4)))
              (loop-result
               (loop for val across my-vector collect val)))
  -      (assert-equal ____ loop-result)))
  +      (assert-equal '(0 1 2 3 4) loop-result)))
   
   
   (define-test test-loop-across-2d-array
       (let* ((my-array (make-array '(3 3) :initial-contents '((0 1 2) (3 4 5) (6 7 8))))
              (loop-result
               (loop for i from 0 below (array-total-size my-array) collect (row-major-aref my-array i))))
  -      (assert-equal loop-result ____ )))
  +      (assert-equal loop-result '(0 1 2 3 4 5 6 7 8) )))
   
   
   (define-test test-loop-across-2d-array-respecting-shape
  
positive.code:              (loop for letter in letters
                     for i from 1 to 1000
                     collect (list i letter))))
        (assert-equal loop-result ____)))
  
  
  (define-test test-counting-loop-skip-by-syntax
  
negative.code:              (loop for letter in letters
                     for i from 0 to 1000 by 5
                     collect (list i letter))))
        (assert-equal loop-result '((0 :a) (5 :b) (10 :c) (15 :d) ))))
  
  
  (define-test test-counting-backwards
      (let ((loop-result
               (loop for i from 10 downto -10 by 5
                     collect i )))
        (assert-equal loop-result '(10 5 0 -5 -10))))
  
  
  (define-test test-loop-in-vs-loop-on
  