code: private static void appendDigits(final Appendable buffer, final int value) throws IOException {
  		buffer.append((char) (value / 10 + '0'));
  		buffer.append((char) (value % 10 + '0'));
  	}
docs: Appends two digits to the given buffer.
  
  @param buffer the buffer to append to.
  @param value the value to append digits from.