Fixing readme formatting

README.md

@@ -21,6 +21,7 @@ Will forward request for localhost/test to localhost:8000/test and localhost:800
 nginx.add(['localhost:8000', 'localhost:8001'], 'test'), function(err) {
   console.log(err);
 });  
+```
 ---------------------------------------- 
 
 This will remove localhost:8000 from the /test endpoint