viv_posts_show.html.erb

<div class="row">
  <div class="span8">
     <h1><%= @post.title %></h1>
      <small>
        submitted <%= time_ago_in_words(@post.created_at) %> ago by 
        <%= @post.user.name %>
      </small>   
    <p><%= @post.body %></p>
  </div>
  <div class="col-md-4">
    <% if policy(@post).update? %>
     <%= link_to "Edit", edit_topic_post_path(@post), class: 'btn btn-success' %>
    <% end %>
</div>