I prefer middledot to grave to mark local links

src/calibre/web/feeds/news.py

@@ -1877,7 +1877,7 @@ def internal_postprocess_book(self, oeb, opts, log):
                             arelpath = sorted(articles, key=numeric_sort_key)[0]
                             a.set('href', item.relhref(arelpath))
                             if a.text and len(a) == 0:
-                                a.text = a.text + '`'
+                                a.text = a.text + '·'  # mark as local link
                             if url not in seen:
                                 log.debug(f'Resolved internal URL: {url} -> {arelpath}')
                                 seen.add(url)