tdf#80671: mediawiki, no superscript tags allowed in footnotes

Change-Id: I54c2cc0fc6b2a9c631fc83f59c2204dd5e374d2c
Reviewed-on: https://gerrit.libreoffice.org/38666Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Julien Nabet <serval2412@yahoo.fr>

swext/mediawiki/src/filter/odt2mediawiki.xsl

@@ -1438,7 +1438,7 @@
 				<value-of select="'}'"/>
 				 -->
 
-				<if test="$superscript and not($superscript-left)">
+				<if test="$superscript and not($superscript-left) and not(boolean(ancestor::text:note))">
 					<text>&lt;sup&gt;</text>
 				</if>
 				<if test="$subscript and not($subscript-left)">
@@ -1476,7 +1476,7 @@
 				<if test="$subscript and not($subscript-right)">
 					<text>&lt;/sub&gt;</text>
 				</if>
-				<if test="$superscript and not($superscript-right)">
+				<if test="$superscript and not($superscript-right) and not(boolean(ancestor::text:note))">
 					<text>&lt;/sup&gt;</text>
 				</if>