Documentation for the var-arg method

[ShinyaYoshida]

Hi,
I implemented the documentation with the ellipsis for the var-arg method:

-> String.format(
java.lang.String.format(java.lang.String arg0, java.lang.Object... arg1)
java.lang.String.format(java.util.Locale arg0, java.lang.String arg1,
java.lang.Object... arg2)


Please review my patch & test:
http://cr.openjdk.java.net/~shinyafox/kulla/201504202/webrev.00/

Regards,
shinyafox(Shinya Yoshida)