Fixed another typo.

funclang-taddeus/series3/ass7.ml

@@ -55,7 +55,7 @@ let rec isSublist l s =
 
 (* 7 *)
 let rec lookup l key =
-    (* Math key to the first tuple and return the value-side of the tuple if
+    (* Match key to the first tuple and return the value-side of the tuple if
     * matched. Otherwise, lookup in the rest of the tuples *)
     match l with
     | [] -> raise (Failure "lookup")