output.txt

         ID: salt-master service
    Function: cmd.run
        Name: echo service salt-master restart | at now + 1 minute
      Result: False
     Comment: An exception occurred in this state: Traceback (most recent call last):
                File "/usr/lib/python2.7/dist-packages/salt/state.py", line 1746, in call
                  **cdata['kwargs'])
                File "/usr/lib/python2.7/dist-packages/salt/loader.py", line 1703, in wrapper
                  return f(*args, **kwargs)
                File "/usr/lib/python2.7/dist-packages/salt/states/cmd.py", line 845, in run
                  name, timeout=timeout, python_shell=True, **cmd_kwargs
              TypeError: run_all() got multiple values for keyword argument 'python_shell'

state.sls

salt-master service:
  cmd.run:
    - name: echo service salt-master restart | at now + 1 minute
    - python_shell: True
    - order: last
    - onchanges:
      - /etc/salt/master