title: Generating a list of which files changed between hg versions
body: <p>I want to generate a list of which files changed between two revisions in a given directory in Mercurial.</p>
  
  <p>In particular, I am not interested in <em>what</em> changed, but <em>which files</em> changed in that directory.</p>
  
  <p>E.g., supposing that between <code>then</code> and <code>otherthen</code>, only 2 files changed:</p>
  
  <pre><code>&gt;hg hypothetical-command -r then:otherthen
  foo.baz
  bar.baz
  &gt;
  </code></pre>
  
  <p>What's the hypothetical command? I've tried diff and log, but I can't see how to convince them to do it: either I get the patch(diff), or I get the whole repo(log).</p>