diff --git a/exercises/09_strings/strings4.rs b/exercises/09_strings/strings4.rs
index 9d9eb480..47307263 100644
--- a/exercises/09_strings/strings4.rs
+++ b/exercises/09_strings/strings4.rs
@@ -4,6 +4,7 @@ fn placeholder() {}
 fn string_slice(arg: &str) {
     println!("{arg}");
 }
+
 fn string(arg: String) {
     println!("{arg}");
 }