[syntax] comments break module signature definition

[nadako]

Looks like GitHub highlighter hates jokes as well:

module type JsonApi = sig
    type t
    val (* Ben & *) jarray : t list -> t
    val jobject : (string * t) list -> t
    val jbool : bool -> t
    val jstring : string -> t
    val jint : int -> t
    val jnull : t
end