message: Improve `Point::ORIGIN` documentation
diff: @@ -11,7 +11,7 @@ pub struct Point {
  }
  impl Point {
  - /// The origin (i.e. a [`Point`] with both X=0 and Y=0).
  + /// The origin (i.e. a [`Point`] at (0, 0)).
  ///
  /// [`Point`]: struct.Point.html
  pub const ORIGIN: Point = Point::new(0.0, 0.0);
  