completion v2: some small follow-ups

- Prevent completion on "create" subcommands to prevent them
  from completing with local filenames
- Add completion for "docker image save"
- Add completion for "docker image tag"
- Disable completion for "docker login"
- Exclude "paused" containers for "docker container attach" and
  "docker container exec"

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

cli/command/image/pull.go

@@ -7,6 +7,7 @@ import (
 
 	"github.com/docker/cli/cli"
 	"github.com/docker/cli/cli/command"
+	"github.com/docker/cli/cli/command/completion"
 	"github.com/docker/cli/cli/trust"
 	"github.com/docker/distribution/reference"
 	"github.com/pkg/errors"
@@ -37,6 +38,7 @@ func NewPullCommand(dockerCli command.Cli) *cobra.Command {
 		Annotations: map[string]string{
 			"category-top": "5",
 		},
+		ValidArgsFunction: completion.NoComplete,
 	}
 
 	flags := cmd.Flags()