Minor formatting cleanup.
Minor formatting cleanup.

jamesbroadhead/pyyaml,anishathalye/pyyaml,fuchsia-mirror/third_party-pyyaml,yaml/pyyaml,jamesbroadhead/pyyaml,fuchsia-mirror/third_party-pyyaml,yaml/pyyaml,yaml/pyyaml,anishathalye/pyyaml