Replace remaining gendered pronouns

To respect all genders, fix comments to not assume users use binary
pronouns (or even that users are “he”s), but rather use singular “they”.

Also fix some typos that happened to result in gendered pronouns, and a
few incorrect commas and missing articles in comments near the fixed
pronouns.

I skipped four files:

- HISTORY – the release notes were made with the wording they were made
  with, I’m not sure if rewording them afterwards is okay
- tests/phpunit/data/preprocess/All_system_messages.{txt,expected} –
  these are test cases generated from somewhere, I’d regenerate them
  rather than updating
- languages/i18n/qqq.json – fixed on Translatewiki instead to make their
  edit histories more useful

Bug: T387626
Change-Id: I282406a0e1407be548e917735fe7eb9a6bf8b136

1 files changed, 1 insertions, 1 deletions

diff --git a/includes/RenameUser/RenameuserSQL.php b/includes/RenameUser/RenameuserSQL.php
index 91f8362e815c..2dd8bf766964 100644
--- a/includes/RenameUser/RenameuserSQL.php
+++ b/includes/RenameUser/RenameuserSQL.php
@@ -332,7 +332,7 @@ class RenameuserSQL {
 		/** @var \MediaWiki\RenameUser\Job\RenameUserTableJob[] $jobs */
 		$jobs = []; // jobs for all tables
 		// Construct jobqueue updates...
-		// FIXME: if a bureaucrat renames a user in error, he/she
+		// FIXME: if a bureaucrat renames a user in error, they
 		// must be careful to wait until the rename finishes before
 		// renaming back. This is due to the fact the job "queue"
 		// is not really FIFO, so we might end up with a bunch of edits