module ExtList:Additional and modified functions for lists.sig
..end
The OCaml standard library provides a module for list functions.
This ExtList module can be used to override the List module or
as a standalone module. It provides new functions and modify
the behavior of some other ones (in particular all functions
are now tail-recursive).
module List:sig
..end
val (@) : 'a list -> 'a list -> 'a list
List.append
.