code: func StripLow(str string, keepNewLines bool) string {
  	chars := ""
  	if keepNewLines {
  		chars = "\x00-\x09\x0B\x0C\x0E-\x1F\x7F"
  	} else {
  		chars = "\x00-\x1F\x7F"
  	}
  	return BlackList(str, chars)
  }
docs: // StripLow remove characters with a numerical value < 32 and 127, mostly control characters.
  // If keep_new_lines is true, newline characters are preserved (\n and \r, hex 0xA and 0xD).