title: Git diff two branches with a dot (.) in the name
body: <p>When I run <code>git diff origin/r35.2..origin/r35.3</code> I get:</p>
  
  <pre><code>fatal: bad revision 'origin/r35.2..origin/r35.3'
  </code></pre>
  
  <p>How do I escape the dots in the name?</p>