ansible/changelogs/fragments/53229-docker_swarm_service-return-value.yml

bugfixes:
- "docker_swarm_service - the return value was documented as ``ansible_swarm_service``, but the
   module actually returned ``ansible_docker_service``. Documentation and code have been updated
   so that the variable is now called ``swarm_service``. In Ansible 2.7.x, the old name
   ``ansible_docker_service`` can still be used to access the result."