<div class="form-group">
    <span>${h.HTML(ungettext(u'%s author',u'%s authors',len(c.authors))) % (h.literal('<b>%s</b>') % len(c.authors)) }</span>
    %for email, user in c.authors:
      <span data-toggle="tooltip" title="${user}">
        ${h.gravatar_div(email, size=20)}
      </span>
    %endfor
</div>
