incremential variable-migration incorrectly adding python_ceph_packages to user_local_variables.yml

[brewc]

When running incremental-upgrade.sh, during the variable-migrations play run, it attempts to append python_ceph_packages to /opt/openstack_deploy/user_local_variables.yml. However it incorrectly indents the apended text and includes the EOT

-- snitting from user_local_variables.yml
maas_holland_venv_enabled: True
python_ceph_packages:

• python-ceph

EOT