submit-social-housing-lettings-and-sales-data/app/views/home/_data_box_row_of_two.html.erb

<div class="app-data-box-one-half">
  <%= render partial: "home/data_box", object: left_data_box %>
</div>
<% if right_data_box %>
  <div class="app-data-box-one-half">
    <%= render partial: "home/data_box", object: right_data_box %>
  </div>
<% end %>