XSL, copy an xml file while changing some formatting

I have a really simple problem that I cannot solve.

I would like to format an xml file using xsl in this simple way.

<A>
   <B attribute1="bla1" attribute2="bla2"/>
   <C attribute3="bla3" attrribute3="bla4"/>
</A>

and transform it to

<A>
   <B 
         attribute1="bla1" 
         attribute2="bla2"
    />
   <C 
         attribute3="bla3" 
         attrribute3="bla4"
    />
</A>

I get something a bit similar using this following code but with problem of indentation

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/开发者_运维知识库Transform" version="1.0">

<xsl:output method="xml" indent="yes" encoding="UTF-8"/>
<xsl:template match="@*|node()">
<xsl:copy>
    <xsl:apply-templates/>
    <xsl:for-each select="@*">
        <xsl:value-of select="name()"/><xsl:text> = "</xsl:text><xsl:value-of select="."/>"
    </xsl:for-each>
</xsl:copy>
</xsl:template>

If some one has an idea how to resolve that it will be great :)

Thanks in advance loic