@@ -22,7 +22,7 @@ func newDockerCommand(dockerCli *command.DockerCli) *cobra.Command {

 	var flags *pflag.FlagSet

 	cmd := &cobra.Command{

-		Use:              "docker [OPTIONS] COMMAND [arg...]",

+		Use:              "docker [OPTIONS] COMMAND [ARG...]",

 		Short:            "A self-sufficient runtime for containers",

 		SilenceUsage:     true,

 		SilenceErrors:    true,

@@ -20,7 +20,7 @@ or execute `docker help`:

 ```bash

 $ docker

-Usage: docker [OPTIONS] COMMAND [arg...]

+Usage: docker [OPTIONS] COMMAND [ARG...]

        docker [ --help | -v | --version ]

 A self-sufficient runtime for containers.

@@ -5,7 +5,7 @@

 docker \- Docker image and container command line interface

 # SYNOPSIS

-**docker** [OPTIONS] COMMAND [arg...]

+**docker** [OPTIONS] COMMAND [ARG...]

 **docker** daemon [--help|...]