Documentation: https://www.mediawiki.org/wiki/Echo_%28Notifications%29/New_formatter_system

@Catrope, Any preferred deadline to complete this? So that we can plan it properly in our sprints with correct priority.

In T116834#1774786, @santhosh wrote:

@Catrope, Any preferred deadline to complete this? So that we can plan it properly in our sprints with correct priority.

We'd be happy to do this ourselves, since we are the ones that rewrote the notification formatting system in the first place. We probably want to get these done in the next 2 weeks or so.