themes/bootstrap-2/views/articles/_meta.html.erb
<div class='meta'>
<p>
<small>
<% author_span = content_tag :span, article.user.nickname, class: 'p-author h-card'
tags = tag_links(article) unless article.tags.empty? %>
<%= t('.published_on_html', publish_date_and_time: display_date_and_time(article.published_at), by: author_span, tags: tags) %>
</small>
</p>
</div>