title: ArgumentError in Users#index for Hartl Rails Tutorial
body: <p>I keep running into an error when i try to see the index of users. This is in chapter 9 of Hartl's Ruby on Rails Tutorial (an excellent tutorial)</p>
  
  <p>wrong number of arguments (2 for 1)</p>
  
  <pre><code>&lt;li&gt;
    &lt;%= gravatar_for user, size: 52 %&gt;
    &lt;%= link_to user.name, user %&gt;
    &lt;% if current_user.admin? &amp;&amp; !current_user?(user) %&gt;
      | &lt;%= link_to "delete", user, method: :delete,
                                    data: { confirm: "You sure?" } %&gt;
    &lt;% end %&gt;
  &lt;/li&gt;
  </code></pre>
  
  <p>I don't know why it thinks that line 2 thinks that I am calling 2 arguments.</p>