code: def reassign_arguments(self):
          
          condition = (
              "variable-list" in self.arguments and
              "list-of-flags" not in self.arguments
          )
          if condition:
              self.arguments["list-of-flags"] = (
                  self.arguments.pop("variable-list"))
              self.rargs_cnt = 1
docs: Deal with optional stringlist before a required one.