app/views/layouts/tables_report.html.erb
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta content="text/html; charset=utf-8" http-equiv="Content-Type" />
<meta content="width=device-width" name="viewport" />
<%= stylesheet_link_tag 'tables-report' %>
<title><%= @header || message.subject %></title>
</head>
<body>
<div class="usa-prose">
<%= yield %>
</div>
</body>
</html>