whitespace between title subtile a,b,c

gfl-plugin/src/main/resources/gfl-indexer.xslt

@@ -124,7 +124,7 @@ Refer to comments in the code to understand the used algorithm.
                </xsl:for-each>
                <field name="title"> 
                      <xsl:for-each select="title">
-                        <xsl:value-of select="./normalize-space()"/>
+                        <xsl:value-of select="./normalize-space()"/><xsl:text></xsl:text>
                      </xsl:for-each>
                   </field>
                <xsl:if test="edition!=''">