[css-transforms-2] Specify when 'scale' is 2d vs 3d, and per resolution, making 'scale:2' equivalent to 'scale: 2 2'.

Author: tabatkins

css-transforms-2/Overview.bs

@@ -557,7 +557,7 @@ each specifying a translation against one axis,
 in the order X, Y, then Z.
 Unspecified translations default to ''0px''.
 
-If only one or two values or given,
+If only one or two values are given,
 this specifies a 2d translation,
 equivalent to the ''translate()'' function.
 If three values are given,
@@ -609,7 +609,18 @@ Animatable: as <<number>> list
 The 'scale' property accepts 1-3 values,
 each specifying a scale along one axis,
 in order X, Y, then Z.
-Unspecified scales default to ''1''.
+
+If only the X value is given,
+the Y value defaults to the same value.
+
+If one or two values are given,
+this specifies a 2d scaling,
+equivalent to the ''scale()'' function.
+If three values are given,
+this specifies a 3d scaling,
+equivalent to the ''scale3d()'' function.
+
+----
 
 All three properties accept
 (and default to)