Increase margin-bottom of last textual element in tabset content

[DavidOliver]

Increases margin of last element unless it's a pre (code box).

Left: before. Right: after.

[github-actions]

📦 Docs artifacts are ready: https://github.com/elixir-lang/ex_doc/actions/runs/13020222605/artifacts/2500531122

[josevalim]

Should we check for pre? Or should we check for the last child being a p? For example, what if it is admonition? Or a table? Or an image?

[DavidOliver]

I believe most other types of content should benefit from the 1.25em margin, but I'm setting up some tests now and will report back soon.

[DavidOliver]

Good call - there were improvements to make. I've set margins for the first and last children of some different kinds. This leaves spacing between elements in a tabpanel unaffected.

I'm going to look at margins here for narrow viewports now.

[josevalim]

It seems quite some work for small adjustments but if you are happy with it, ship it!

[DavidOliver]

For the narrow viewport widths, I've just tightend up the first-child table margin-top and the last-child table margin-bottom.