Merge pull request #23423 from totten/5.50-mixin-since
authorEileen McNaughton <emcnaughton@wikimedia.org>
Tue, 10 May 2022 23:44:04 +0000 (11:44 +1200)
committerGitHub <noreply@github.com>
Tue, 10 May 2022 23:44:04 +0000 (11:44 +1200)
(NFC) mixin/**.php - Add @since tags


Trivial merge