read: two lists side by side come back as one list

[willkg]

Problem

read and export write two adjacent lists of the same kind with a blank line between them, and Markdown reads that as one loose list, so the next publish merges them. Found by the table property test in #55.

Reproduced 2026-09-25 (read → publish):

storage	read writes	publish sends
<ol><li>a</li></ol><ol><li>b</li></ol>	1. a blank line 1. b	one <ol> with two items, each wrapped in <p> (a loose list)
<ul><li>a</li></ul><ul><li>b</li></ul>	- a blank line - b	one <ul> with two items, each wrapped in <p>

Two lists become one, and the items gain paragraph spacing. It happens anywhere read writes blocks: the top level, layout cells, macro bodies and raw table cells. The table property test's generator avoids writing adjacent lists so that it does not fail on this.

Notes

• CommonMark ends a list when the bullet character changes (- then *) or the ordered delimiter changes (. then )), and an HTML comment between the two (<!-- -->) also separates them. Changing the marker is the least noisy fix, but it has to survive the next read, so the Markdown stays a fixed point.