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

[Chris Hegarty]

On 09/12/16 00:13, Xueming Shen wrote:
> Hi,
>
> Please help some trival usage msg clean of the jar command
>
> issue: https://bugs.openjdk.java.net/browse/JDK-8170952
> webrev: http://cr.openjdk.java.net/~sherman/8170952/

Thank you Sherman, the code changes look good to me.

-Chris.