anchor.diff:  
                     h4 Contact Information
                     p Name: #{book.userID.name}
  -                  p Email: #{book.userID.email}
  -                  p Phone: #{book.userID.phone}
  +                  p Email: 
  +                    a(href="mailto:"+book.userID.email) #{book.userID.email}
  +                  p Phone: 
  +                    a(href="tel:"+book.userID.phone, target="_blank") #{book.userID.phone}
                   .col-md-2.col-sm-offset-1
                     img.book_thumbnail(src=book.thumbnail) 
positive.code:             .panel-body
                .row
                  .col-md-6
                    h1 #{book.title} 
                      //- span.btn.btn-success.disabled $#{book.price}
                    
                    h3 #{book.authors}
  
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)
  