fix layout for snippets

app/views/layouts/snippets.html.haml

 !!! 5
 %html{ lang: "en"}
   = render "layouts/head", title: "Snipepts"
-  %body{class: "#{app_theme} application", :'data-page' => body_data_page}}
+  %body{class: "#{app_theme} application", :'data-page' => body_data_page}
     = render "layouts/head_panel", title: "Snippets"
     = render "layouts/flash"
     %nav.main-nav