Multiline output support? #91

Thank you for this awesome plugin.

I wanna know if there is a way to make the output of the command little bit tidier. When I use this check "args=--connection /var/run/docker.sock --containers all --status running", I get messy output beacuse I have many containers. I could use --no-ok option, but I want to see containers in output, but every container in its own line if it is possible.

Thank you and best regards