Use haml instead of content_tag

app/views/layouts/application.html.haml

@@ -92,7 +92,7 @@
       #notifications
 
       - flash.each do |name, msg|
-        = content_tag :div, msg, :id => "flash_#{name}"
+        %div{:id => "flash_#{name}"}= msg
 
     %header{:class=>('landing' unless current_user)}
       = render 'layouts/header'