Minor title bug fix

ws/Docbook/Extensions/Xsl/docbook2docbook.xsl

@@ -67,7 +67,7 @@
             <xsl:apply-templates select="@* | node()"/>
             <appendix>
                 <title>
-                    <xsl:text>List of exercise sets</xsl:text>
+                    <xsl:text>List of exercise sets in </xsl:text>
                     <xsl:value-of select="db:title" />
                 </title>