Comment 5 for bug 419266

Fix in r13260. The plain svg export is now no longer dependant on updateRepr to both clone the xml tree AND remove sodipodi elements. Using it in this way was very broken.

The prune method was improved to include removing any inkscape/sodipodi elements and not just attributes.

The plain-svg output will still not include PI nodes or comments before the root element until the xml code has a duplicate method that can clone the entire document node.