code: def dump_functions(self, e): # ()
          u
          print
          txt="\n".join(self.rl_settings_to_string())
          print txt
          self._print_prompt()
          self.finalize()
docs: u"""Print all of the functions and their key bindings to the Readline
          output stream. If a numeric argument is supplied, the output is
          formatted in such a way that it can be made part of an inputrc
          file. This command is unbound by default.