anchor.diff:  
   <% elsif controller_name == "file_sets" %>
   
  -  <meta name="citation_title" content="<%= @presenter.page_title.html_safe %>">
  +  <meta name="citation_title" content="<%= @presenter.page_title %>">
   
     <% @presenter.creator.each do |creator_name| %>
  -    <meta name="citation_author" content="<%= creator_name.html_safe %>">
  +    <meta name="citation_author" content="<%= creator_name %>">
     <% end %>
   
     <% if @presenter.sort_date.present? %>
  
positive.code: <% if controller_name == "monograph_catalog" %>
  
    <meta name="citation_title" content="<%= @presenter.page_title.html_safe %>">
  
    <% if @presenter.present? %>
      <% @presenter.creator.each do |creator_name| %>
        <meta name="citation_author" content="<%= creator_name.html_safe %>">
      <% end %>
    <% end %>
  
  
negative.code: 
    <% if @presenter.isbn_noformat.present? %>
      <% @presenter.isbn_noformat.each do |isbn_noformat| %>
        <meta name="citation_isbn" content="<%= isbn_noformat %>">
      <% end %>
    <% end %>
  
  