More debug trait fun

rustbook/rectangles/src/main.rs

@@ -7,7 +7,7 @@ struct Rectangle {
 fn main() {
     let rect1 = Rectangle { width: 30, height: 50 };
 
-    println!("rect1 is {:?}", rect1);
+    println!("rect1 is {:#?}", rect1);
 
     println!(
         "The area of the rectangle is {} square pixels.",