def stripped(text):
    """Remove invisible characters

    Remove all characters not between the ascii 32 and 127
    and not an ascii 10 (line feed)
    """

    def whitelist(c: int) -> bool:
        if 31 < c < 127 or c == 10:
            return True
        return False

    return "".join(filter(lambda c: whitelist(ord(c)), text))