anchor.diff:              (loop for letter in letters collect letter))
              (loop-result-on
               (loop for letter on letters collect letter)))
  -      (assert-equal loop-result-in ____)
  -      (assert-equal loop-result-on ____ )))
  +      (assert-equal loop-result-in letters)
  +      (assert-equal loop-result-on '((:a :b :c) (:b :c) (:c)) )))
   
   
   (define-test test-loop-in-skip-by
  
positive.code:            (result (loop for (a b) in '((1 9) (2 8) (3 7) (4 6))
                          do (setf count (+ 1 count))
                           collect (+ a b))))
        (assert-equal ____ count)
        (assert-equal ____ result)))
  
  
  (define-test test-conditional-execution
      (let ((loop-return
             (loop for x in '(1 1 2 3 5 8 13)
                   when (evenp x) sum x)))
        (assert-equal loop-return ____)))
  
  
  (defun greater-than-10-p (x)
  
negative.code:     (let ((loop-return
             (loop for x in '(1 1 2 3 5 8 13)
                   when (greater-than-10-p x) sum x)))
        (assert-equal loop-return 13)))
  
  
  (define-test test-conditional-with-lambda
      (let ((loop-return
             (loop for x in '(1 1 2 3 5 8 13)
                   when ((lambda (z) (equal 1 (mod z 3))) x) sum x)))
        (assert-equal loop-return 15)))
  