See also: https://gist.github.com/joewiz/b53612a8b7744b8d1d24d2028770a79d
//indexer/@preserve-whitespace-mixed-content="yes"
//indexer/@suppress-whitespace="none"
//serializer/@indent="no"
//serializer/@enable-xinclude="no"
When working with eXide, avoid its auto-indent:
declare option exist:serialize "indent=no expand-xincludes=no";