preview.html.erb in lines-engine-0.3

- old
+ new

@@ -5,12 +5,10 @@
   <title>Lines</title>
   <%= stylesheet_link_tag    "lines/application", media: "all" %>
   <%= javascript_include_tag "lines/application" %>
 </head>
 <body>
-<div id="pagewrap">
-  <div id="content">
-    <%= yield %>
-  </div>
+<div class="container">
+  <%= yield %>
 </div>
 </body>
 </html>
\ No newline at end of file