Parsing an XML doc with DocumentBuilder.parse() and then serializing the
Document with DocumentLS.saveXML() should produce the original document
w/o modification. The original doc specified an encoding as UTF-8, the
serialized doc lost that information.

Diff between the parsed and the serialized docs:

<?xml version="1.1" encoding="UTF-8"?> versus
<?xml version="1.1"?>
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