docs: def format(self):
          """Dump the class data in the format of a .netrc file."""
          self._netrc.hosts = dedictify_machines(self.machines)
          rep = ""
          for host in self._netrc.hosts.keys():
              attrs = self._netrc.hosts[host]
              rep += "machine {host}\n\tlogin {attrs[0]}\n".format(host=host,
                                                                   attrs=attrs)
              if attrs[1]:
                  rep += "\taccount {attrs[1]}\n".format(attrs=attrs)
              rep += "\tpassword {attrs[2]}\n".format(attrs=attrs)
          for macro in self._netrc.macros.keys():
              rep += "macdef {macro}\n".format(macro=macro)
              for line in self._netrc.macros[macro]:
                  rep += line
              rep += "\n"
          return rep