<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:m="http://www.w3.org/1998/Math/MathML">
-<xsl:output method="xml" indent="yes"/>
+<xsl:output method="xml"/>
<!-- Copy of the root or m:math or a node different from mml elements -->
<!-- with all its attributes -->