When run on a container that is already running, docker always succeeds. This was an intentional change in v0.10; it previously caused an error. This commit clarifies the man pages to indicate this is intended behavior. Docker-DCO-1.1-Signed-off-by: Matthew Heon <mheon@redhat.com> (github: mheon) Upstream-commit: d96eb47dee10a059436b4d4cf285db1d70468e26 Component: engine