fix: Header on the all actions machine example

fgmacedo · fgmacedo · commit 915dfde487b8 · 2023-01-04T13:43:37.000-03:00
diff --git a/tests/examples/all_actions_machine.py b/tests/examples/all_actions_machine.py
@@ -1,6 +1,6 @@
 """
 All actions machine
--------------------
+===================
 
 A StateMachine that exercices all possible :ref:`Actions` and :ref:`Guards`.
 
