Append static text to the Format.

        :param text: The text to append.

def append_text(self, text):
        """
        Append static text to the Format.

        :param text: The text to append.
        """

        if (self.conversions and
                isinstance(self.conversions[-1],
                           conversions.StringConversion)):
            self.conversions[-1].append(text)
        else:
            self.conversions.append(conversions.StringConversion(text))