corrects a typo

guides/source/i18n.md

@@ -470,7 +470,7 @@ OK! Now let's add a timestamp to the view, so we can demo the **date/time locali
 ```erb
 # app/views/home/index.html.erb
 <h1><%=t :hello_world %></h1>
-<p><%= flash[:notice] %></p
+<p><%= flash[:notice] %></p>
 <p><%= l Time.now, format: :short %></p>
 ```