anchor.diff:      >
         <i class="icon icon-tag"/>
       </button>
  -    <script>
  -        $(function () {
  -            $('#tagsBTN').popover({trigger: "hover"});
  -
  -        });
  -    </script>
  -
   
       <button
           id="favBTN"
  
positive.code: <% if !user_signed_in? %>
      <button
      id="tagsBTN"
      class="disabled btn btn-share btn-addTag"
      type="button"
      data-toggle="popover"
      data-placement="bottom"
  
negative.code:     </button>
      <script>
    $(function () {
        $('.tagsBTN').popover({trigger: "hover"});
        $('.favBTN').popover({trigger: "hover"});
  
    });
  </script>
  