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#!/usr/bin/ruby
require 'rubygems'
require 'nokogiri'
XSL = <<-EOXSL
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" encoding="ISO-8859-1"/>
<xsl:param name="indent-increment" select="' '"/>
<xsl:template name="newline">
<xsl:text disable-output-escaping="yes">
</xsl:text>
</xsl:template>
<xsl:template match="comment() | processing-instruction()">
<xsl:param name="indent" select="''"/>
<xsl:call-template name="newline"/>
<xsl:value-of select="$indent"/>
<xsl:copy />
</xsl:template>
<xsl:template match="text()">
<xsl:param name="indent" select="''"/>
<xsl:call-template name="newline"/>
<xsl:value-of select="$indent"/>
<xsl:value-of select="normalize-space(.)"/>
</xsl:template>
<xsl:template match="text()[normalize-space(.)='']"/>
<xsl:template match="*">
<xsl:param name="indent" select="''"/>
<xsl:call-template name="newline"/>
<xsl:value-of select="$indent"/>
<xsl:choose>
<xsl:when test="count(child::*) > 0">
<xsl:copy>
<xsl:copy-of select="@*"/>
<xsl:apply-templates select="*|text()">
<xsl:with-param name="indent" select="concat ($indent, $indent-increment)"/>
</xsl:apply-templates>
<xsl:call-template name="newline"/>
<xsl:value-of select="$indent"/>
</xsl:copy>
</xsl:when>
<xsl:otherwise>
<xsl:copy-of select="."/>
</xsl:otherwise>
</xsl:choose>
</xsl:template>
</xsl:stylesheet>
EOXSL
xsl = Nokogiri::XSLT(XSL)
xml = Nokogiri(STDIN.read)
STDOUT.print xsl.apply_to(xml).to_s
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