Exam 1 Correction

I made a mistake for the last example for Question 11 on the Exam. It should be:

  (count-tandem-repeats (list 1 2 3 1 2 1 2 3) 3) should evaluate to 1

The first instance does count (as is clear from the other examples), so the result of count-tandem-repeats should always be at least 1.