fix sample code in README.md

README.md

@@ -8,12 +8,12 @@ Lightweight stream-based WebSocket implementation for [Rust](http://www.rust-lan
 let server = TcpListener::bind("127.0.0.1:9001").unwrap();
 for stream in server.incoming() {
     spawn (move || {
-        let mut websocket = accept(stream.unwrap());
+        let mut websocket = accept(stream.unwrap()).unwrap();
         loop {
             let msg = websocket.read_message().unwrap();
             websocket.write_message(msg).unwrap();
         }
-    })
+    });
 }
 ```