code: func inspectString(container string, format string) string {
  	args := []string{"inspect", "--format=" + format, container}
  	output, err := commandOutput("docker", args)
  	if err != nil {
  		return ""
  	}
  	return output
  }
docs: // Returns the value referenced by the go template for
  // the `docker inspect` as a string, fallbacking to
  // an empty string on error