handle -dev

commands.go

@@ -436,7 +436,7 @@ func (cli *DockerCli) CmdVersion(args ...string) error {
 	release := utils.GetReleaseVersion()
 	if release != "" {
 		fmt.Fprintf(cli.out, "Last stable version: %s", release)
-		if VERSION != release || out.Version != release {
+		if strings.Trim(VERSION, "-dev") != release || strings.Trim(out.Version, "-dev") != release {
 			fmt.Fprintf(cli.out, ", please update docker")
 		}
 		fmt.Fprintf(cli.out, "\n")