Re-generate files again

tests/snapshots/output/changes.snapshot.txt

@@ -10,7 +10,7 @@ _ fn main() {
 ~         "The perimeter of the rectangle is {} pixels.",
 ~         perimeter(&rect1)
       );
-+     println!(r#"This line contains invalid utf8:  "øˆ€€€"#;
++     println!(r#"This line contains invalid utf8:  "�����"#;
   }
   
   fn area(rectangle: &Rectangle) -> u32 {