Reformat 'len_utf8' (again);

Author: bjoernager

library/core/src/char/methods.rs

@@ -1740,7 +1740,7 @@ const fn len_utf8(code: u32) -> usize {
         ..MAX_ONE_B => 1,
         ..MAX_TWO_B => 2,
         ..MAX_THREE_B => 3,
-        _ => 4
+        _ => 4,
     }
 }