Revert newline changes

notebook/templates/tree.html

@@ -26,7 +26,6 @@ data-server-root="{{server_root}}"
 {% block site %}
 
   <div id="ipython-main-app" class="container">
-
     <div id="tab_content" class="tabbable" role="main">
       <ul id="tabs" class="nav nav-tabs">
         <li class="active"><a href="#notebooks" data-toggle="tab">{% trans %}Files{% endtrans %}</a></li>
@@ -204,4 +203,4 @@ data-server-root="{{server_root}}"
 
 
 <script src="{{ static_url("tree/js/main.min.js") }}" type="text/javascript" charset="utf-8"></script>
-{% endblock %}
+{% endblock %}