title: Gem install error (sass compass)
body: <p>When I want to install sass and compass, I get this message. Can someone help me? </p>
  
  <pre><code>Microsoft Windows [version 6.1.7601]
  Copyright (c) 2009 Microsoft Corporation. Tous droits réservés.
  
  C:\Users\Bk&gt;gem install sass
  
  ERROR:  While executing gem (Encoding::UndefinedConversionError)
      U+2019 to CP850 in conversion from UTF-16LE to UTF-8 to CP850
  </code></pre>