anchor.diff:  <br>
   
   <%= link_to 'New Post', new_post_path %>
  +
  +
  +
  
positive.code:   <thead>
      <tr>
        <th>Title</th>
        <th>Content</th>
        <th colspan="3"></th>
      </tr>
  
negative.code:     <% @posts.each do |post| %>
        <tr>
          <td><%= post.title %></td>
          <td><%= post.created_at %></td>
          <td><%= post.content %></td>
          <td><%= link_to 'Show', post %></td>
          <td><%= link_to 'Edit', edit_post_path(post) %></td>
  