fix fmt

src/main.rs

@@ -2,8 +2,7 @@ use warp::Filter;
 
 #[tokio::main]
 async fn main() {
-    let hello = warp::get()
-        .map(|| format!("Hello world!"));
+    let hello = warp::get().map(|| format!("Hello world!"));
 
     warp::serve(hello).run(([127, 0, 0, 1], 5309)).await;
 }