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   1 + │ /// A rectangle. First line is changed to prevent a regression of #1869
   2   │ struct Rectangle {
   3   │     width: u32,
   4   │     height: u32,
   5   │ }
   6   │ 
   7 _ │ fn main() {
   8   │     let rect1 = Rectangle { width: 30, height: 50 };
   9   │ 
  10   │     println!(
  11 ~ │         "The perimeter of the rectangle is {} pixels.",
  12 ~ │         perimeter(&rect1)
  13   │     );
  14 + │     println!(r#"This line contains invalid utf8:  "�����"#;
  15   │ }
  16   │ 
  17   │ fn area(rectangle: &Rectangle) -> u32 {
  18   │     rectangle.width * rectangle.height
  19   │ }
  20 + │ 
  21 + │ fn perimeter(rectangle: &Rectangle) -> u32 {
  22 + │     (rectangle.width + rectangle.height) * 2
  23 + │ }
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