Batteries user guide : BatNum.Infix

`sig
type bat__infix_t = t
val ( + ) : bat__infix_t -> bat__infix_t -> bat__infix_t
val ( - ) : bat__infix_t -> bat__infix_t -> bat__infix_t
val ( * ) : bat__infix_t -> bat__infix_t -> bat__infix_t
val ( / ) : bat__infix_t -> bat__infix_t -> bat__infix_t
val ( ** ) : bat__infix_t -> bat__infix_t -> bat__infix_t
val ( -- ) : bat__infix_t -> bat__infix_t -> bat__infix_t BatEnum.t
val ( --- ) : bat__infix_t -> bat__infix_t -> bat__infix_t BatEnum.t
val ( =/ ) : BatNum.num -> BatNum.num -> bool
val ( </ ) : BatNum.num -> BatNum.num -> bool
val ( >/ ) : BatNum.num -> BatNum.num -> bool
val ( <=/ ) : BatNum.num -> BatNum.num -> bool
val ( >=/ ) : BatNum.num -> BatNum.num -> bool
val ( <>/ ) : BatNum.num -> BatNum.num -> bool
val ( +/ ) : BatNum.num -> BatNum.num -> BatNum.num
val ( -/ ) : BatNum.num -> BatNum.num -> BatNum.num
val ( */ ) : BatNum.num -> BatNum.num -> BatNum.num
val ( // ) : BatNum.num -> BatNum.num -> BatNum.num
val ( **/ ) : BatNum.num -> BatNum.num -> BatNum.num
end`