code: @Override
    protected String quoteFilename(final StringBuffer buf, final String filename) {
      buf.setLength(0);
      BorlandProcessor.quoteFile(buf, filename);
      return buf.toString();
    }
docs: Encloses problematic file names within quotes.
  
  @param buf
  string buffer
  @param filename
  source file name
  @return filename potentially enclosed in quotes.