code: ColorBuffer pad(ColorBuffer str, int len) {
      int n = str.getVisibleLength();
      while (n < len) {
        str.append(" ");
        n++;
      }
  
      return append(str);
    }
docs: Pad the specified String with spaces to the indicated length
  
  @param str The String to pad
  @param len The length we want the return String to be
  @return the passed in String with spaces appended until the
  length matches the specified length.