Re:Avoid corrupting DefElem nodes when parsing publication_names and publish options

Hi,

I have checked the relevant invocations of `SplitIdentifierString`, 
and there are indeed issues with these two places – presumably an oversight during the initial addition. 
I approve of your modification; perhaps you could set the status to `Ready for Committer`.

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Regards,
Man Zeng
www.openhalo.org