title: Why am I told to 'cd' when updating Homebrew?
body: <p>Since my latest update of Homebrew (to 1.0.0), instead of just seeing</p>
  
  <pre><code>Checking out v1.0.1 in /usr/local/Homebrew...
  </code></pre>
  
  <p>when I <code>brew update</code> or <code>brew upgrade --all</code> I now see</p>
  
  <pre><code>Checking out v1.0.1 in /usr/local/Homebrew...
  To checkout v1.0.1 in /usr/local/Homebrew run:
    'cd /usr/local/Homebrew &amp;&amp; git checkout v1.0.1
  </code></pre>
  
  <p>Is that an error I should do something about? What's going on here? Are updates no failing for me?</p>