RFR [15/java.xml] 8238183: SAX2StAXStreamWriter cannot deal with comments prior to the root element

[Joe Wang]

Hi,

Please review a fix for the StAXResult impl. The issue was that it 
output comment prior to the declaration, resulting in an invalid XML 
document. The patch focuses on fixing this issue, but it does not cover 
other issues the StAXResult impl may have (e.g. JDK-8241711).

JBS: https://bugs.openjdk.java.net/browse/JDK-8238183
webrev: http://cr.openjdk.java.net/~joehw/jdk15/8238183/webrev/

Thanks,
Joe