;; of array, so every level's lookup is O(N) rather than O(1). We could easily
;; solve this by using char-tables instead of alists, but that would make every
;; level take up a lot more memory, and it would make the resulting
-;; datastructure harder to read (by a human) when printed out.
+;; data structure harder to read (by a human) when printed out.
;;; Code: