Matt Clay 7f0e09aa31 Keep existing to_yaml behavior with pyyaml >= 5.1. (#53772) ... In pyyaml versions before 5.1 the default_flow_style for yaml.dump was None. Starting with 5.1 it is now False. This change explicitly sets the value to None to maintain the original to_yaml behavior. The change to pyyaml was made in the following commit: 507a464ce6		2019-03-13 16:43:26 -07:00
..
ansible	Keep existing to_yaml behavior with pyyaml >= 5.1. (#53772)	2019-03-13 16:43:26 -07:00