I'm not sure if we should rely on {sys.version_info.minor - 1}, as it implies we always upgrade from version X to X+1 (which is usually expected) but it could happen that this is not the case and we won't probably notice.

If we are really diverging between the classic Salt Minion service file and the venv-salt-minion.service file, we should consider at some point to simply has separated files in our "openSUSE/salt" repo. So we have a cleaner spec.

Nitpick: The initial whitespace at the begining should be removed