anchor.diff:            <% guide.parts.each do |nav_part| %>
             <li <% if part == nav_part %>class="active"<% end %>>
               <a href="<%= guide_path(guide.slug, nav_part.slug) %>">
  -              <p class="step">
  -                <span><%= nav_part.number %></span>
  -              </p>
  -              <h3><%= nav_part.title %></h3>
  +              <h3>Part <%= nav_part.number %>: <%= nav_part.title %></h3>
               </a>
             </li>
             <% end %>
  
positive.code: <html lang="en">
  <head>
    <meta charset="utf-8" />
    <title><%= guide.title %> - gov.uk</title>
    <link rel="stylesheet" type="text/css" href="/stylesheets/guides.css" />
  </head>
  <body>
  
negative.code:     </aside>
  
      <article role="article">
        <div class="inner">
  
          <header>
            <h1><a href="#" rel="bookmark" title="Permanent link to <%= part.title %>"><%= part.title %></a></h1>
          </header>
  
          <nav class="pagination" role="navigation">
            <%- if guide.has_previous_part?(part) -%>
            <p class="previous"><a href="<%= guide_path(guide.slug, guide.part_before(part).slug) %>">&larr; Previous part</a></p>
            <%- end -%>
            <p class="pages">Part <%= part.number %> of <%= guide.parts.length %> in this guide.</p>
            <%- if guide.has_next_part?(part) -%>
            <p class="next"><a href="<%= guide_path(guide.slug, guide.part_after(part).slug) %>">Next part &rarr;</a></p>
            <%- end -%>
          </nav>
  
          <%= Govspeak::Document.new(part.body).to_html %>
  
          <footer>
    	      <nav class="pagination" role="navigation">
    	        <%- if guide.has_previous_part?(part) -%>
    	        <p class="previous"><a href="<%= guide_path(guide.slug, guide.part_before(part).slug) %>">&larr; Previous part</a></p>
    	        <%- end -%>
    	        <p class="pages">Part <%= part.number %> of <%= guide.parts.length %> in this guide.</p>
    	        <%- if guide.has_next_part?(part) -%>
    	        <p class="next"><a href="<%= guide_path(guide.slug, guide.part_after(part).slug) %>">Next part &rarr;</a></p>
    	        <%- end -%>
    	      </nav>
          </footer>
  
        </div>
      </article>
  
    </section>
  