anchor.diff:              .panel-body
                 .row
                   .col-md-6
  -                  h1 #{book.title} 
  +                  h1 #{book.title} - 
  +                    span.btn.btn-success.disabled $#{book.price}
  +
                       //- span.btn.btn-success.disabled $#{book.price}
                     
                     h3 #{book.authors}
  
positive.code: 
                    h4 Contact Information
                    p Name: #{book.userID.name}
                    p Email: #{book.userID.email}
                    p Phone: #{book.userID.phone}
                  .col-md-2.col-sm-offset-1
                    img.book_thumbnail(src=book.thumbnail) 
negative.code: each book in data
          .panel.panel-default.inplace_search_item(title=book.title)
            .panel-heading
              h4.panel-title
                a.accordion-toggle(data-toggle='collapse',data-parent="#accordion", href="#"+book._id)
  