fix: refined medium parser

src/extractors/custom/medium.com/index.js

@@ -18,9 +18,9 @@ export const MediumExtractor = {
       // Allow drop cap character.
       'section span:first-of-type': $node => {
         const $text = $node.html();
-        if ($text.length === 1) return 'span';
-
-        return null;
+        if ($text.length === 1 && /^[a-zA-Z()]+$/.test($text)) {
+          $node.replaceWith($text);
+        }
       },
       // Re-write lazy-loaded youtube videos
       iframe: $node => {
@@ -62,7 +62,7 @@ export const MediumExtractor = {
     // Is there anything that is in the result that shouldn't be?
     // The clean selectors will remove anything that matches from
     // the result
-    clean: ['svg'],
+    clean: ['span a', 'svg'],
   },
 
   date_published: {