app/views/articles/show/_article.html.erb
<div class="content">
<%= render partial: 'masthead',
locals: {
article: article,
article_section: article_section } %>
<%= render partial: 'subnav',
locals: {
article: article,
article_section: article_section } %>
<div class="row">
<div class="article">
<%= sanitize(article_section.description) if article_section.present? %>
</div>
</div>
</div>