title: Hg: how to get diff of two different files?
body: <p>I'm sorry if it's odd question. I have a mercurial repository. Is it possible to get a diff of two different files from some revision by <code>hg</code>? For example, there is a revision</p>
  
  <pre><code>revision xxx
      - file1
      - file2
  </code></pre>
  
  <p>How I can get a diff of <code>file1</code> and <code>file2</code> by standard hg command or any extensions?</p>
  
  <p>Thank you.</p>
  
  <p><strong>UPD</strong>
  I would like something like this:</p>
  
  <pre><code>hg diff -r xxx file1 file2
  </code></pre>
  
  <p>Than I will have all changes between two files of same revision.</p>