Re-generate files again

tests/snapshots/output/grid_header_numbers.snapshot.txt

@@ -13,7 +13,7 @@
   10 │         "The perimeter of the rectangle is {} pixels.",
   11 │         perimeter(&rect1)
   12 │     );
-  13 │     println!(r#"This line contains invalid utf8:  "øˆ€€€"#;
+  13 │     println!(r#"This line contains invalid utf8:  "�����"#;
   14 │ }
   15 │ 
   16 │ fn area(rectangle: &Rectangle) -> u32 {