Fixing message echo send

side-watcher/src/main.rs

@@ -26,7 +26,7 @@ fn main() {
                 // retrieve this client's `Responder`:
                 let responder = clients.get(&client_id).unwrap();
                 // echo the message back:
-                responder.send(message));
+                responder.send(message);
             }
         }
     }