I think we need to have a wocky_xmpp_writer_write_node() function for the cases where single nodes need to be serialized, and the <?xml ...?> is not desired.
Created attachment 43339 [details] [review] Add wocky_xmpp_writer_write_node() function.
It turns out this isn't really necessary. The presence of the <?xml..?> PI isn't really the end of the world when serializing just part of an XML tree.
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