Typo in ZipException an -> a

[Martin Buchholz]

Looks good to me!

On Thu, May 13, 2010 at 20:03, Xueming Shen <xueming.shen at oracle.com> wrote:
> A trivial doc typo.
>
> http://cr.openjdk.java.net/~sherman/6951064/webrev
>
> Thanks,
> -Sherman
>