Re: [docbook-apps] Reducing the top-margin and botton margin in programlisting

<xsl:attribute name="space-before.minimum">0.8em</xsl:attribute>
 <xsl:attribute name="space-before.optimum">1em</xsl:attribute>
 <xsl:attribute name="space-before.maximum">1.2em</xsl:attribute>
 <xsl:attribute name="space-after.minimum">0.8em</xsl:attribute>
 <xsl:attribute name="space-after.optimum">1em</xsl:attribute>
 <xsl:attribute name="space-after.maximum">1.2em</xsl:attribute>