Print the command that is run

go/archive/archive.go

@@ -75,6 +75,11 @@ func main() {
	cmd := exec.Command("prince", "--javascript", "--raster-output", fmt.Sprintf(".archive/%x-%%02d.png", buf), u.String())
	cmd.Stderr = prefixWriter("    | ", os.Stderr)
	cmd.Stdout = prefixWriter("    | ", os.Stdout)
	fmt.Print("    ", cmd.Args[0])
	for _, arg := range cmd.Args[1:] {
		fmt.Print(" ", arg)
	}
	fmt.Println()
	err = cmd.Run()
	if err != nil {
		exit("prince", err)