Update mock_components_userdoc.rst

hardware_interface/doc/mock_components_userdoc.rst

@@ -27,6 +27,11 @@ Features:
 Parameters
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+disable_commands (optional; boolean; default: false)
+  Disables mirroring command to states. 
+  This option is helpful to simulate an erroneous connection to the hardware when nothing breaks, but suddenly there is no feedback from a hardware interface.
+  Or it can help you to test your setup when the hardware is running without feedback, i.e., in the open loop.
+
 mock_sensor_commands (optional; boolean; default: false)
   Creates fake command interfaces for faking sensor measurements with an external command.
   Those interfaces are usually used by a :ref:`forward controller <forward_command_controller_userdoc>` to provide access from ROS-world.