🐛 Lists will break a greybox because of indentation

[tiagov8]

Cc: @Tanya-Leahy @adamcogan @bradystroud @leahy268

Hi team,

I've seen a couple of these in the past and @Tanya-Leahy found 5+ more (all manually fixed by me on #8968 and #8970)

When you have a list inside a greybox (same on info box and email templates), the code somehow adds an identation to the closing ::: tag which makes it render wrongly:

• 1. Please investigate and fix

Figure: The identation in Markdown (not done by the editor)

Figure: Broken greybox in the live page