Lists previously had a static marginVertical that stacked with
paragraph.marginBottom, producing 20px gaps and oversized whitespace
around paragraphs sandwiched between lists.
Spacing is now context-aware via the render rule: list -> list keeps
the normal paragraph gap (back-to-back lists read as continuous
content) while p <-> list transitions get a slightly larger gap (lists
read as their own section). Static margins can't satisfy both because
RN doesn't collapse margins, so the bullet_list / ordered_list rule
inspects the next sibling type and picks marginBottom accordingly.
Mohamed Boudra
eed61d338c