title: Carrierwave: Use spaces instead of underscore
body: <p>We have an uploader for PDF's. When a file name has spaces in it, they are automatically being converted to use underscores:</p>
  
  <p><code>some file test</code> -> <code>some_file_test</code></p>
  
  <p>I'd like to keep the spaces. Can someone tell me how?</p>
  
  <p>I tried:</p>
  
  <pre><code>  def filename
      original_filename
    end
  </code></pre>