feat: Implement Document#parent, which always returns nil #3481
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What problem is this PR intended to solve?
We've
undefed theparentmethod inDocumentsince ffbfc73 in 2009. There's no good reason to do so, and restoring the method so it returnsnilmakes the Document object quack more like the Node that it is.Closes #3466
Have you included adequate test coverage?
Yes.
Does this change affect the behavior of either the C or the Java implementations?
N/A