app/views/agents/_history_list.html.erb
<div id="history">
<ul>
<%- @agent.versions.reverse.each_with_index do |version, i| -%>
<li>
<%- unless @agent.user.blank? -%>
<%# = link_to l(version.created_at), user_path(@agent.user, :version_id => version.id) -%>
<%= l(version.created_at) -%>
<%- else -%>
<%#= link_to l(version.created_at), agent_path(@agent, :version_id => version.id) -%>
<%= l(version.created_at) -%>
<%- end -%>
<%- if i == 0 -%>
(<%= t('page.current_version') -%>)
<%- end -%>
</li>
<%- end -%>
</ul>
</div>