mode	screenshot	text
mobile		see below (table breaks)
desktop		(Username or IP removed)

{{#ifeq:{{FULLPAGENAME}}|Special:Contributions| [Username or IP has been suppressed for this edit. As an oversighter you can still see the edit in the user's contributions]|(Username or IP removed)}} when it's supposed to be (Username or IP removed).

Acceptance criteria

• Switch usages of $this->msg( 'rev-deleted-user' )->plain(); to $this->msg( 'rev-deleted-comment' )->escaped();
• Switch usages of $this->msg( 'rev-deleted-comment' )->plain(); to $this->msg( 'rev-deleted-comment' )->escaped();
• Make sure we've done this in all special pages - includes/specials/SpecialMobileContributions.php, includes/specials/SpecialMobileDiff.php and includes/specials/MobileSpecialPageFeed.php

Developer notes

This can be replicated on https://en.m.wikipedia.org/wiki/Special:History/User_talk:Ponyo when anonymous looking at 22 November 2018.

Interestingly, when I view this (as a logged in user) I see:

However when I look in incognito window I see the issue above.

It looks like the message being used has been overridden to use parsed HTML:
https://en.m.wikipedia.org/wiki/MediaWiki:Rev-deleted-user?action=edit

This can be fixed either by community editing that template OR MobileFrontend allowing HTML/wikitext .

To fix in MobileFrontend we'd need to do the following
Edit includes/specials/MobileSpecialPageFeed.php

Replace:

$username = $this->msg( 'rev-deleted-user' )->plain();

with

$username = $this->msg( 'rev-deleted-user' )->escaped();

We should also check the behaviour for $this->msg( 'rev-deleted-comment' )->plain(); and in other pages

Replication steps

• Ensure https://www.mediawiki.org/wiki/Extension:ParserFunctions is installed locally
• Edit rev-deleted-user with content

{{#ifeq:{{FULLPAGENAME}}|Special:Contributions| [Username or IP has been suppressed for this edit. As an oversighter you can still see the edit in the user's contributions]|(Username or IP removed)}}

• Enable delete revision for admins

$wgGroupPermissions['sysop']['deleterevision'] = true;

• See T118864 and give your username surpressor rights
• As an admin
• Visit a history page and "Change visibility of selected revision"
• In incognito visit the history page in mobile to see the problem