Brion, Andrew? Are you both not involved in Echo anymore? Adding Terry on CC.

(In reply to comment #0)

A. A user on translatewiki.net has asked if GENDER is supported in message[1].

[1] 'notification-edit-talk-page' => '$2 edited your talk page $3'

Yes.

B. What's the link text of the diff link $3? A page title, so for example
"User_talk:Siebrand"?

The 'diff' message in brackets, like this:

'(' . wfMessage( 'diff' )->escaped() . ')'

(from formatters/EditFormatter.php)

C. What does "formatted" mean in the description of $2?

It's the HTML link to the user's page made with Linker::userLink. Take a look at function formatUser in formatters/NotificationFormatter.php.

Nemo_bis wants me to document this, reopening...

'(' . wfMessage( 'diff' )->escaped() . ')' is an i18n bug that should be reported and tracked separately.

(In reply to comment #4)

'(' . wfMessage( 'diff' )->escaped() . ')' is an i18n bug that should be
reported and tracked separately.

Could probably be solved by changing $3 to ($3) in the message...

Gerrit change 22283

Merged. You should probably open a separate bug for that hardcoded brackets problem.