docs: Update README with better tests 📚

README.md

@@ -65,11 +65,11 @@ use ratatui_macros::{vertical, horizontal};
 use ratatui::prelude::Rect;
 
 let area = Rect { x: 0, y: 0, width: 10, height: 10 };
+
 let vertical_layout = vertical![==100%, >=3];
 let [main, bottom] = vertical_layout.split(area).to_vec().try_into().unwrap();
 assert_eq!(bottom.height, 3);
 
-let area = Rect { x: 0, y: 0, width: 10, height: 10 };
 let horizontal_layout = horizontal![==100%, >=3];
 let [main, right] = horizontal_layout.split(area).to_vec().try_into().unwrap();
 assert_eq!(right.width, 3);