change docstring phrasing, fix .mli files

lib/color.ml

@@ -6,19 +6,19 @@ let black = (0, 0, 0)
 (** RGB code for white *)
 let white = (255, 255, 255)
 
-(** RGB color code for red *)
+(** RGB code for red *)
 let red = (255, 1, 1)
 
-(** RGB color code for green *)
+(** RGB code for green *)
 let green = (1, 255, 1)
 
-(** RGB color code for blue *)
+(** RGB code for blue *)
 let blue = (1, 1, 255)
 
-(** RGB color code for yellow *)
+(** RGB code for yellow *)
 let yellow = (255, 255, 1)
 
-(** RGBA color constant to set transparent background *)
+(** RGBA constant to set transparent background *)
 let transparent = (0, 0, 0, 0)
 
 (** Converts RGB color into opaque RGBA color. 

lib/joy.ml

@@ -30,7 +30,6 @@ let scale = Transform.scale
 let translate = Transform.translate
 let compose = Transform.compose
 let repeat = Transform.repeat
-let map_color = Transform.map_color 
 let map_fill = Transform.map_fill
 let map_stroke = Transform.map_stroke
 

lib/joy.mli

@@ -18,7 +18,6 @@ val translate : int -> int -> transformation
 val scale : float -> transformation
 val compose : transformation -> transformation -> transformation
 val repeat : int -> transformation -> transformation
-val map_color : (color -> color) -> shape -> shape 
 val map_stroke : (color -> color) -> shape -> shape 
 val map_fill : (color -> color) -> shape -> shape
 

lib/transform.mli

@@ -5,6 +5,5 @@ val scale : float -> transformation
 val rotate : int -> transformation
 val compose : transformation -> transformation -> transformation
 val repeat : int -> transformation -> transformation
-val map_color : (Color.color -> Color.color) -> transformation
 val map_fill : (Color.color -> Color.color) -> transformation
 val map_stroke : (Color.color -> Color.color) -> transformation