Fixed a few typo

Author: sta

README.md

@@ -134,19 +134,19 @@ Creating a class that inherits `WebSocketService` class.
 
 For example, if you want to provide the echo service,
 
- ```cs
- using System;
- using WebSocketSharp;
- using WebSocketSharp.Server;
-
- public class Echo : WebSocketService
- {
-   protected override void onMessage(object sender, MessageEventArgs e)
-   {
-  Send(e.Data);
-   }
- }
- ```
+```cs
+using System;
+using WebSocketSharp;
+using WebSocketSharp.Server;
+
+public class Echo : WebSocketService
+{
+ protected override void onMessage(object sender, MessageEventArgs e)
+ {
+ Send(e.Data);
+ }
+}
+```
 
 For example, if you want to provide the chat service,