spreadsheetml2ooo.xsl was not well formed xml

broken by...

commit 6909838e29
Date:   Thu Apr 25 18:08:33 2019 +0200

    Fix typo

Change-Id: I40ee245faa75c885d76299ddee79fdaca9d0d715
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/91233
Reviewed-by: Julien Nabet <serval2412@yahoo.fr>
Tested-by: Jenkins

filter/source/xslt/import/spreadsheetml/spreadsheetml2ooo.xsl

@@ -8863,7 +8863,7 @@
         </xsl:choose>
     </xsl:template>
     <xsl:template name="min-of-three">
-        <i!-- return lowest of three for sorting -->
+        <!-- return lowest of three for sorting -->
         <xsl:param name="first-num"/>
         <xsl:param name="second-num"/>
         <xsl:param name="third-num"/>