Reproduce:
- Disable edit recovery in your preference (it is disabled by default)
- View https://en.wikipedia.org/wiki/Special:EditRecovery
Actual: displays "You have no unsaved changes."
Expected: the page should say you did not enable edit recovery, and (1) for registered users, provide a link to https://en.wikipedia.org/wiki/Special:Preferences#mw-prefsection-editing where edit recovery can be enabled; (2) for non-registered (or temporary) users, instruct them to create a (permanent) account.