anchor.diff:        .form-group
           label.col-md-1="Collection"
           .col-md-10
  +          div.label.label-danger#collection_unsaved(style="display:none")="unsaved"
             textarea.form-control.af(id="collection" name="collection" rows=2 readonly=!article.isChangeAllowed("collection")) #{article.collection}
             textarea.hidden.form-control(id="old_collection" name="old_collection",rows=1,hide=true) #{article.collection}
       .row
  
positive.code:           .col-md-2
            .col-md-10
              span.label.label-default(id="left_lang" class="#{lbg}")=params.left_lang
  
          .row.markdownArea
            .col-md-2
  
negative.code:           .col-md-12
              for l in layout.activeLanguages
                if l === params.right_lang
                  span.label.label-default.RL(class="RL-#{l}")=l
                  span.label.label-danger.RL(style="display:none" id="markdown"+l+"_unsaved" class="RL-#{l}")="unsaved"
                else
                  span.label.label-default.RL.hidden(class= "RL-#{l}")=l
                  span.label.label-danger.RL.hidden(style="display:none" id="markdown"+l+"_unsaved" class="RL-#{l}")="unsaved"
  
          .row
            .col-md-12
              for l in layout.activeLanguages
  