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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def add_subcommand_formatting(self, command):
 """Adds formatting information on a subcommand. The formatting should be added to the :attr:`paginator`. The default implementation is the prefix and the :attr:`Command.qualified_name` optionally followed by an En dash and the command's :attr:`Command.short_doc`. Parameters command: :class:`Command` The command to show information of. """

        fmt = '{0}{1} \N{EN DASH} {2}' if command.short_doc else '{0}{1}'
        self.paginator.add_line(fmt.format(self.clean_prefix, command.qualified_name, command.short_doc))