Update events format in man page
Update events format in man page

Signed-off-by: Alexandr Morozov <4efb7da3e38416208b41d8021a942884d8a9435c@docker.com>

josemonsalve2/docker,AdamOssenford/docker-pi,AdamOssenford/docker-pi,seanmcdaniel/docker,josemonsalve2/docker,AdamOssenford/docker-pi,seanmcdaniel/docker,ClusterHQ/docker-plugins,carlye566/docker_eric,ClusterHQ/docker-plugins,ClusterHQ/docker-plugins,carlye566/docker_eric,josemonsalve2/docker,carlye566/docker_eric,seanmcdaniel/docker