Address review comments.
Docker-DCO-1.1-Signed-off-by: Vishnu Kannan (github: vishh)
@@ -1297,7 +1297,7 @@ It is even useful to cherry-pick particular tags of an image repository
## exec
- Usage: docker exec CONTAINER COMMAND [ARG...]
+ Usage: docker exec [OPTIONS] CONTAINER COMMAND [ARG...]
Run a command in an existing container
