anchor.diff:          tbody
             if (history)
               each change in history
  -              tr(onclick="document.getElementById('id_#{change.id}').classList.toggle('hidden');")
  +
  +              tr(onclick="$('.class_#{change.id}').toggleClass('hidden');")
  +                td
  +                  if change.property && change.property.substring(0, 8) === "markdown"
  +                    span.glyphicon.glyphicon-triangle-right(class="class_#{change.id}")
  +                    span.glyphicon.glyphicon-triangle-bottom.hidden(class="class_#{change.id}")
                   td
                     a(href='#{layout.htmlroot}/changes/' + change.id)
                       span.glyphicon.glyphicon-info-sign
  
positive.code:         thead
            tr
              th=""
              th user
              th blog
              th table
  
negative.code:                     !{change.htmlDiffText(60)}
                  td=layout.moment(change.timestamp).locale(layout.user.language).format("L")
                if change.property && change.property.substring(0,8)==="markdown"
                  tr(class="class_#{change.id}").hidden
                    td
                    td
                    td(colspan=4).bg-info
  