Correct skip operator comment.

network.rkt

@@ -53,7 +53,7 @@
  ;; Skip operators are used to generate the graph edges.
  ;;
  ;; Params:
- ;; i: Results in an operator acting on the lowest i digits.
+ ;; i: Results in an operator acting on digits 0 to i.
  ;;
  ;; Example:
  ;; > ((skip-sylvester-radix 2) '(0 0 0))