title: Mercurial(HG) update with UnicodeDecodeError
body: <p>When I try to use "hg update", this shows up:</p>
  
  <pre><code>UnicodeDecodeError: 'utf8' codec can't decode byte 0xd6 in position 21: invalid continuation byte
  </code></pre>
  
  <p>This Error occurs in OSX, not in Windows.</p>