module FormatExt:sig
..end
val pp_print_string_spaced : Format.formatter -> string -> unit
val pp_print_list : (Format.formatter -> 'a -> unit) ->
('b, Format.formatter, unit) Pervasives.format ->
Format.formatter -> 'a list -> unit
pp_print_list pp_elem sep fmt lst
Print the list lst
of elements
using pp_elem
for each element and separate them by sep
.