def to_a
      res = [self]
      nr = self.next_repeat
      while nr do
        res << nr
        nr = nr.next_repeat
      end
      res
    end
def to_a
      res = [self]
      nr = self.next_repeat
      while nr do
        res << nr
        nr = nr.next_repeat
      end
      res
    end
Present self and all repeats as an array with self being #0