anchor.diff:  
   block content
   
  -    .container-fluid(style="margin-top:20px;")
  +    .container(style="margin-top:20px;")
   
           h1 Play Ground
   
  
positive.code:                     .modal-header
                          button.close(type='button', data-dismiss='modal', aria-label='Close')
                              span(aria-hidden='true') ×
                          h4#myModalLabel.modal-title Checkout
                      .modal-body
                          #checkoutData
                      .modal-footer
                          button.btn.btn-default(type='button', data-dismiss='modal') Close
                          button.btn.btn-primary(type='button') Save changes
  
negative.code: 
              #playground
  
              br
  
              a.btn.btn-primary.btn-sm(onclick="addAcc();") + Добавить отель
  
              hr
  
              a#checkout.btn.btn-success.pull-right(onclick="checkout();") Checkout
  
          // Button trigger modal
          //button.btn.btn-primary.btn-lg(type='button', data-toggle='modal', data-target='#myModal') Launch demo modal
  