app/views/shared/_feed.html.erb
<% if @feed_items.any? %>
<ol class="microposts">
<%= render partial: 'shared/feed_item', collection: @feed_items %>
</ol>
<%= will_paginate @feed_items %>
<% else %>
<div class="alert alert-block">
<h4 class="alert-heading"><%= t("feeds.no_messages") %></h4>
</div>
<% end %>