Fix for issue #2832: make p5subset.xml valid against p5odds.rng.

Author: martindholmes

P5/Utilities/subset.xsl

@@ -68,9 +68,9 @@
   <!-- Keep stub bibliography entries just in case someone points to them -->
   <xsl:template match="listBibl/bibl[@xml:id]|listBibl/biblStruct[@xml:id]">
     <xsl:text>&#x0A;</xsl:text>
-    <xsl:copy>
+    <bibl>
       <xsl:copy-of select="@xml:id"/>
-    </xsl:copy>
+    </bibl>
   </xsl:template>
 
   <!--