cargo fmt

Pure formatting, no functional change.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

src/widgets/widget.rs

@@ -88,6 +88,9 @@ mod tests {
         assert_eq!(e.x + e.width, 15);
         assert_eq!(e.y + e.height, 102);
         let e2 = b.expand(a);
-        assert_eq!((e2.x, e2.y, e2.width, e2.height), (e.x, e.y, e.width, e.height));
+        assert_eq!(
+            (e2.x, e2.y, e2.width, e2.height),
+            (e.x, e.y, e.width, e.height)
+        );
     }
 }