application.html.erb in devise-3.2.4

- old
+ new

@@ -5,10 +5,10 @@
     <title>Devise Test App</title>
   </head>
   <body>
     <div id="container">
       <%- flash.each do |name, msg| -%>
-        <%= content_tag :div, msg, :id => "flash_#{name}" %>
+        <%= content_tag :div, msg, id: "flash_#{name}" %>
       <%- end -%>
 
       <% if user_signed_in? -%>
         <p>Hello User <%= current_user.email %>! You are signed in!</p>
       <% end -%>