def _in_range(char: str) -> bool:
            """Return True if char is in the range (0, 91).

            Parameters
            ----------
            char : str
                The character to check

            Returns
            -------
            bool
                True if char is in the range (0, 91)

            .. versionadded:: 0.1.0

            """
            return 91 > ord(char) > 0