Batteries user guide : BatPrintf

`sig type ('a, 'b, 'c) t = ('a, 'b, 'c) Pervasives.format val printf : ('b, 'a BatInnerIO.output, unit) BatPrintf.t -> 'b val eprintf : ('b, 'a BatInnerIO.output, unit) BatPrintf.t -> 'b val sprintf : ('a, unit, string) BatPrintf.t -> 'a val sprintf2 : ('a, 'b BatInnerIO.output, unit, string) Pervasives.format4 -> 'a val fprintf : 'a BatInnerIO.output -> ('b, 'a BatInnerIO.output, unit) BatPrintf.t -> 'b val ifprintf : 'c -> ('b, 'a BatInnerIO.output, unit) BatPrintf.t -> 'b val bprintf : Buffer.t -> ('a, Buffer.t, unit) BatPrintf.t -> 'a val bprintf2 : Buffer.t -> ('b, 'a BatInnerIO.output, unit) BatPrintf.t -> 'b val kfprintf : ('a BatInnerIO.output -> 'b) -> 'a BatInnerIO.output -> ('c, 'a BatInnerIO.output, unit, 'b) Pervasives.format4 -> 'c val ksprintf : (string -> 'a) -> ('b, unit, string, 'a) Pervasives.format4 -> 'b val ksprintf2 : (string -> 'b) -> ('c, 'a BatInnerIO.output, unit, 'b) Pervasives.format4 -> 'c val kbprintf : (Buffer.t -> 'a) -> Buffer.t -> ('b, Buffer.t, unit, 'a) Pervasives.format4 -> 'b val kbprintf2 : (Buffer.t -> 'b) -> Buffer.t -> ('c, 'a BatInnerIO.output, unit, 'b) Pervasives.format4 -> 'c val kprintf : (string -> 'a) -> ('b, unit, string, 'a) Pervasives.format4 -> 'b end`