RFR JDK-8170952: jar's usage message output need some cleanup

[Andrej Golovnin]

Hi,

src/jdk.jartool/share/classes/sun/tools/jar/Main.java

 682                 if (info != null) {
 683                     info.print(out);
 684                    return true;
 685                 }

The indentation in the line 684 is wrong: it uses 3 spaces instead of 4.

Best regards,
Andrej Golovnin