Update arguments in setFromCoplanarPoints to match

docs/api/math/Plane.html

@@ -149,8 +149,8 @@
 		<h3>[method:Plane setFromCoplanarPoints]( [page:Vector3 a], [page:Vector3 b], [page:Vector3 c] )</h3>
 		<div>
 		 [page:Vector3 a] - first point on the plane.<br />
-		 [page:Vector3 a] - second point on the plane.<br />
-		 [page:Vector3 a] - third point on the plane.<br /><br />
+		 [page:Vector3 b] - second point on the plane.<br />
+		 [page:Vector3 c] - third point on the plane.<br /><br />
 
 		Defines the plane based on the 3 provided points. The winding order is assumed to be counter-clockwise,
 		and determines the direction of the [page:.normal normal].