describe: add comments to describe_format

Signed-off-by: Ali Caglayan <[email protected]>

Author: Alizter

bin/describe/describe_format.mli

@@ -6,6 +6,8 @@ type t =
   | Sexp
   | Csexp
 
+(** Command line option for taking a serialisation format *)
 val arg : t Term.t
 
+(** [print_dyn t dyn] prints the dyn to stdout serialised as configured in [t] *)
 val print_dyn : t -> Dyn.t -> unit