Call one Rectangle constructor from the others

src/geometry.rs

@@ -92,19 +92,11 @@ impl Rectangle {
         let width = (corner_a.x() as i64 - corner_b.x() as i64).abs() as u32;
         let height = (corner_a.y() as i64 - corner_b.y() as i64).abs() as u32;
 
-        Rectangle {
-            top_left: Point::new(left, top),
-            width,
-            height,
-        }
+        Rectangle::from_corner_width_height(Point::new(left, top), width, height)
     }
 
     fn at_origin_with_size(width: u32, height: u32) -> Rectangle {
-        Rectangle {
-            top_left: Point::origin(),
-            width,
-            height,
-        }
+        Rectangle::from_corner_width_height(Point::origin(), width, height)
     }
 
     fn width(&self) -> u32 {