don't remove ASCII apostrophe from link targets

fixwikilinks.lua

@@ -1,7 +1,7 @@
 -- Pandoc's wikilinks_title_after_pipe extension makes a start at linking
 -- [[bracketed wiki links]]. This lua filter finishes the job and tries to
 -- mimic Obsidian's wiki linking, by
--- - either hyphen-replacing or dropping all problem characters in the uri
+-- - hyphen-replacing or dropping problem characters in the uri
 -- - adding ".html" to the uri path
 -- - preserving the uri fragment if any
 -- - lower-casing the uri fragment
@@ -10,7 +10,7 @@ function Link(elem)
    if elem.title == "wikilink" then
       t = elem.target .. "#"
       t = string.gsub(t, " ", "-")
-      t = string.gsub(t, "'", "")
+      -- t = string.gsub(t, "'", "")
       path, frag = string.match(t, "([^#]*)#([^#]*)")
       t = path
       if string.len(path) > 0 then