update user guide for replacing 'br/' with 'br /'
diff --git a/user_guide/libraries/user_agent.html b/user_guide/libraries/user_agent.html
index e1d3640..d6641c8 100644
--- a/user_guide/libraries/user_agent.html
+++ b/user_guide/libraries/user_agent.html
@@ -133,7 +133,7 @@
 else if ($this->agent->is_mobile())<br />
 {<br />
 &nbsp;&nbsp;&nbsp;&nbsp;$this->load->view('mobile/home');<br />
-}<br/>
+}<br />
 else<br />
 {<br />
 &nbsp;&nbsp;&nbsp;&nbsp;$this->load->view('web/home');<br />
@@ -223,4 +223,4 @@
 </div>
 
 </body>
-</html>
\ No newline at end of file
+</html>