Please can we be careful with terminology. This is lead paragraph not section. Lead section is already defined as everything up to first heading...

Back on subject: why should it include definition lists? Do you have any examples?

With respect to https://phabricator.wikimedia.org/T169062#3387154
I should point out there is risk associated with changing the definition so unless we have a strong reason to do so... I wouldn't bother.

I say YAGNI it a lot and I think it applies here (http://wiki.c2.com/?YouArentGonnaNeedIt)

But unless your project is very different from mine, you already have too much to do right now. Doing more now is a very bad thing when you already have too much to do.

@ovasileva to add example for formulas

I'm still waiting for answers on https://phabricator.wikimedia.org/T169062#3388821

There is a lot of risk associated with a 5 point task and I'm still not seeing why we are doing this.

@Jdlrobson - you mean in terms of the naming?

Firstly: let's check we are talking about the same thing.
This task is not about page previews it's about where we move the lead paragraph above the infobox.

https://en.wikipedia.org/wiki/Dioxygenyl is a bad and confusing example in this context. This page does not have an infobox. We do not run this code on pages without infoboxes. We only move paragraphs on pages with infoboxes.

I'm yet to see a real world example in a production wiki showing the status quo to be a problem. Do you know of any?

What I'm seeing here is a task recording that something is theoretically is not right. I understand that.
However, in practice in lieu of any counter-examples our existing code seems to be doing everything we need it to.
Despite this, we are proposing changing some stable code in a risky 5 pointer.
I have to ask why is this priority "normal" and why are we considering fixing this right now?