add end-to-end check on unacked edits when user is typing GitOrigin-RevId: 5914eff1f391f18d4e0ab38a39cf284fbdb28480
Fix history loading updates twice on scroll GitOrigin-RevId: 964863c7357eef36b2833c7b1e8ebaa07020fb2c
JSDOM tests GitOrigin-RevId: d9e39c61fb2028c5b5577488d74720ef2985eebc