anchor.diff:  
       .container-fluid
           .row.page-margin
  -            
  +
               nav.archive.top.col-md-12
                   .row    
                       .col-xs-12.col-sm-2.col-md-2.col-lg-1
  
positive.code:                                     .active= op.get(cat, ['properties', lang + '-name', 'value'])
                                          span.icon-checkmark                            
                  
                  .row                            
                      .col-sm-12.col-md-12.col-lg-12
                          ul.pager
                              li.previous
  
negative.code:                                                     span.town= op.get(p, 'performance.town', '')
                                                      br
                                                      span= op.get(p, lang + '-name')
  
                                              else
                                                  a(href='/' + lang + '/event/' + op.get(p,'id'))= op.get(p, lang + '-name')
                                                      span.subtitle= op.get(p, lang + '-subtitle', '')
  