code: func UnicodeTranslatorFromFile(fileStr string) (f func(string) string, err error) {
  	var fl *os.File
  	fl, err = os.Open(fileStr)
  	if err == nil {
  		f, err = UnicodeTranslator(fl)
  		fl.Close()
  	} else {
  		f = doNothing
  	}
  	return
  }
docs: // UnicodeTranslatorFromFile returns a function that can be used to translate,
  // where possible, utf-8 strings to a form that is compatible with the
  // specified code page. See UnicodeTranslator for more details.
  //
  // fileStr identifies a font descriptor file that maps glyph positions to names.
  //
  // If an error occurs reading the file, the returned function is valid but does
  // not perform any rune translation.