RFR JDK-8204229: Formatter and String.format ignore the width with the percent modifier (%5%)

[Xueming Shen]

Hi,

Please help review the change for JDK-8204229. It appears to be a overlook
in the implementation. We do have a method print(String, Locale) that adjust
the "padding spaces"

issue: https://bugs.openjdk.java.net/browse/JDK-8204229
webrev: http://cr.openjdk.java.net/~sherman/8204229/webrev

Thanks,
Sherman