title: difference between "svn update DIR" and "cd DIR && svn update"
body: <p>What is the difference between running: <code>svn update DIR</code> and running <code>svn update</code> with DIR as cwd? (<code>DIR</code> is my checkout's root).</p>
  
  <p>Intuitively, I'd expect the two to do the same thing, but I noticed that when running the former (when cwd is outside the local checkout), sometimes not all updates are fetched. But then running the latter fetches what it needs to.</p>
  
  <p>(running on linux)</p>
  
  <p>EDIT: to all the skeptics, here's a session I've just had:</p>
  
  <pre><code>$ svn up DIR/
  Password for 'xxx': ...
  Skipped 'DIR'
  $ cd DIR/
  $ svn up 
  Password for 'xxx': ...
  U    aaa
  U    bbb
  ...
   U   .
  Updated to revision 8965.
  $ 
  </code></pre>