Have list items occupy their own line

Ensures that HTML list items are on their own line, which fixes a
CSS issue with .hlist; it depends on a breakable character between
list items, and a newline does provide one. Should also unburden
HTML Tidy, as output now matched that of Tidy.

Bug: 39617
Change-Id: I82fb4d749a200cfc049b30d2ee6e96a5ff7574e2
Merge "Have list items occupy their own line"