Build the unicode string to be displayed.

def ustring(self,
                indent,
                color,
                msg,
                prefix='',
                suffix='',
                endc=None):
        '''Build the unicode string to be displayed.'''
        if endc is None:
            endc = self.ENDC  # pylint: disable=no-member

        indent *= ' '
        fmt = u'{0}{1}{2}{3}{4}{5}'

        try:
            return fmt.format(indent, color, prefix, msg, endc, suffix)
        except UnicodeDecodeError:
            return fmt.format(indent, color, prefix, salt.utils.data.decode(msg), endc, suffix)