<!-- Identity transform -->
<xsl:template match="@*|node()">
<xsl:copy>
+ <!--
+ Strip the style attribute while copying elements because it may be
+ dangerous, see:
+ https://validator.w3.org/feed/docs/warning/DangerousStyleAttr.html
+ -->
<xsl:apply-templates select="@*[not(name() = 'style')]|node()"/>
</xsl:copy>
</xsl:template>