-<%= content_tag :head, :data => application_data do %>
+<%= tag.head :data => application_data do %>
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, minimum-scale=1.0, maximum-scale=1.0" />
<%= javascript_include_tag "html5shiv" unless browser.html5? %>