This is what I get when running ansible-playbook:

fatal: [10.9.2.253]: FAILED! => {"changed": false, "failed": true, "invocation": {"module_args": {"install_python_apt": true, "mode": 420, "repo": "ppa:fkrull/deadsnakes", "state": "present", "update_cache": true, "validate_certs": true}, "module_name": "apt_repository"}, "msg": "Invalid repository string: ppa:fkrull/deadsnakes"}