Add a simpler way to fix double redirects. Perhaps a button on Special:DoubleRedirects which updates the first redirect to point the 3rd title (if it first checks that there's no other info on the first and second redirects).
The current way is to a) copy the 3rd title, open the first for editing, and enter #REDIRECT [[3rd title]] — this feels like the sort of mechanical edit that shouldn't need a human typist.
Double redirects should also be exposed on the RedirectManager in-edit dialog window (with perhaps a blue dot marker on the toolbar icon when there's a redirect to be fixed).
Notes
- The redirect fixer is coded in /maintenance/fixDoubleRedirects.php.
- This may need adapting for bulk executing an array pulled from [[special:DoubleRedirects]].
- You need to add a button to smash to execute all of this.
- You might want to restrict the ability to execute this script to admins.