See
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CentralAuth/+/637227/1/includes/specials/SpecialCentralAutoLogin.php
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CategoryWatch/+/637226/1/src/Hook.php
The actual case statements and everything within them should be indented, or nothing should be changed, but just indenting the return/break statements is wrong