def run_active_command
      require_valid_command
      if alias? command_name_from_args
        active_command.run(*(@aliases[command_name_from_args.to_s] + args_without_command_name))
      else
        active_command.run(*args_without_command_name)
      end
    end
def run_active_command
      require_valid_command
      if alias? command_name_from_args
        active_command.run(*(@aliases[command_name_from_args.to_s] + args_without_command_name))
      else
        active_command.run(*args_without_command_name)
      end
    end
Run the active command.