Ian Campbell 2f01ab25ed Correct example yaml ...

Without the space I get:

    FATA[0000] Invalid config: yaml: line 66: could not find expected ':'

Signed-off-by: Ian Campbell <ijc@docker.com>

2017-09-18 15:13:32 +01:00

..

yaml.md

Correct example yaml

2017-09-18 15:13:32 +01:00