anchor.diff:                      .panel-body.RL.hidden(class="RL-#{l}")
                         :verbatim
                           !{article["textHtml"+l]}
  +
           .row
             h4="You can add a comment here:"
           .row
  
positive.code:         if article.categoryEN != "Picture"
            .col-md-1
              p="Preview"
  
  
            +leftcolumn 
              .panel.panel-default
                .panel-body(id="previewLEFT")
                  div
                    :verbatim
                      !{article["textHtml"+params.left_lang]}
  
  
            +rightcolumn
              .panel.panel-default
                .panel-body.RL(id="previewRIGHT" class="RL-#{params.right_lang}")
  
negative.code:                   .panel-body.RL.hidden(class="RL-#{l}")
                      :verbatim
                        !{article["textHtml"+l]}
          else
            .col-md-1
              p="Markdown"
            +leftcolumn
              .panel.panel-default
                .panel-body(id="previewLEFT")=article["markdown"+params.left_lang]
            +rightcolumn
              .panel.panel-default
                .panel-body.RL(id="previewRIGHT" class="RL-#{params.right_lang}")=article["markdown"+params.right_lang]
                each l in layout.activeLanguages
                  if l !== params.right_lang
                    .panel-body.RL.hidden(class="RL-#{l}")=article["markdown"+l]
    .row
      .col-md-1
      +leftcolumn
  