Implement feedback on abbreviations index

modules/fontane/edited-text/abbrev-index.xqm

@@ -48,7 +48,11 @@ declare function abbrev-index:transform($nodes as node()*) as node()* {
             or matches($node, "Gesamtdokumentation")) then
                 ()
             else
-                $node
+                text {
+                    replace($node, "ſ", "s")
+                    => replace("m̄", "mm")
+                    => replace("n̄", "nn")
+                }
 
         case element(xhtml:h2) return
             ()