(* failwithf is a printf-like version of failwith. *)
val failwithf : ('a, unit, string, 'b) format4 -> 'a
+(* Return the list of integers [a..b] (inclusive). *)
+val range : int -> int -> int list
+
(* Read a configuration file as a list of (lineno, key, value) pairs.
* If the config file is missing this returns an empty list.
*)