anchor.diff:  
         <div class="field">
           <%= f.label "Description" %>
  -        <%= f.text_field :description, class: "form-control", autofocus: true %>
  -      </div>
  +        <%= f.text_area :description, class: "form-control", autofocus: true %>
  +      </div><br>
   
         <div class="field">
           <%= f.label "Price" %>
  
positive.code:       <div class="field">
          <%= f.label "Published Date" %>
          <%= f.text_field :published_date, class: "form-control", autofocus: true %>
        </div>
  
        <div class="field">
          <%= f.label "Category" %>
  
negative.code: 
        <div class="field">
          <%= f.label "Title" %>
          <%= f.text_field :title, class: "form-control", placeholder: "required", autofocus: true %>
        </div>
  
        <div class="field">
          <%= f.label "Author" %>
          <%= f.text_field :author, class: "form-control", placeholder: "required", autofocus: true %>
        </div>
  
        <div class="field">
  