Last modified: 2013-03-15 18:48:30 UTC
Start a list item and type 'a', now hit shift-enter and type b. Expected diff: *a<p>b</p> Actual diff: *ab The paragraph created when you create the list has internal.generated = 'wrapper'. This property gets copied when you split the list. Two wrapper paragraphs next to each other apparently get merged into one. The only way wikitext can have two paragraphs in a list is with HTML so extra paragraphs must be full HTML paragraphs.
Fixed by https://gerrit.wikimedia.org/r/#/c/52046/