Fix https://github.com/DandelionSprout/adfilt/discussions/163#discussioncomment-19165408

LegitimateURLShortener.txt

@@ -1,5 +1,5 @@
 ! Title: ➗ Actually Legitimate URL Shortener Tool
-! Version: 28October2026v1
+! Version: 28October2026v2
 ! Expires: 12 hours
 ! Description: In a world dominated by bitLy, adfLy, and several thousand other malware cover-up tools, this list reduces the length of URLs in a much more legitimate and transparent manner. Essentially, it automatically removes unnecessary ?/& values from the URLs, making them easier to copy from the URL bar and pasting elsewhere as links. Enjoy.
 ! Homepage: https://github.com/DandelionSprout/adfilt/discussions/163
@@ -5682,6 +5682,9 @@ $doc,removeparam=smtrctid,domain=samsclub.com|walmart.com
 ||simon.com^$doc,removeparam=bt_ee
 ||simon.com^$doc,removeparam=bt_ts
 
+! https://github.com/DandelionSprout/adfilt/discussions/163#discussioncomment-19165408
+||ck12.org^$doc,removeparam=refcode
+
 !#if !env_mobile
 ! 🖥️ ——— Entries mostly dedicated to maximising image sizes (thus poorly suited for phones) ——— 🖥️ !
 ! https://sproutsluckycorner•files•wordpress•com/2019/12/ring-fit-adventure-smoothies-1•png?w=600 (Shows the actual raw image instead of a promotion page; 25/11/2020)