anchor.diff:                                                  a(href='./magazine/' + op.get(p,'id'))= op.get(p, lang + '-title')
                                                       if op.get(p, 'author', [])
                                                           span.artist= op.get(p, 'author', []).join(', ')
  -                                                    
  +
                                                       span.name= op.get(p, lang + '-title')
  -                                                    
  +
                                                       if op.get(p, lang + '-subtitle', '')
                                                           span.subtitle= op.get(p, lang + '-subtitle', '')
   
  
positive.code:                                 var gradientMap = '#{SAAL.secondary_color}, #{SAAL.main_color}';
  
                                  GradientMaps.applyGradientMap(slide#{id}, gradientMap); 
                          
          .row.page-margin
              
  
              .col-md-12
                  .programme.row
  
negative.code:                                 h1
                                      if op.get(echo, 'author', '')
                                          span.artist= op.get(echo, 'author', '')
  
                                  h1= op.get(echo, lang + '-title', '')
  
                                  if op.get(echo, lang + '-subtitle', '')
                                      p= op.get(echo, lang + '-subtitle', '')
  
  