anchor.diff:        <%= f.text_field :title, required: true,
                                  maxlength: 100,
                                  class: 'form-control' %>
  +
         <p class='help-block'>
           <%= t 'nlt.ads.form.title_tip' %>
         </p>
  
positive.code:                              rows: 10,
                               class: 'form-control',
                               id: 'adbo' %>
        <p class='help-block'>
          <%= t 'nlt.ads.form.body_max' %>
        </p>
  
negative.code:       <%= f.label :image, t('nlt.ads.form.select_an_image'), class: 'optional' %>
  
        <%= f.file_field :image %>
  
        <p class='help-block'>
          <%= t 'nlt.ads.form.image_permitted_formats' %>
        </p>
  