codePreviews: remove spoiler markdown from links smh

src/modules/codePreviews.js

@@ -21,6 +21,7 @@ function unindent(str) {
 }
 
 async function processFile(link, spoiler = false) {
+  link = link.replaceAll("||", "").trim();
   const res = await fetch(link);
   if (!res.ok) return "";
   if (!res.headers.get("Content-Type").startsWith("text/plain")) return "";