The trailer computed shown as page * rows-on-this-page, so a short last
page (page 27 of 1331 rows at 50/page, 31 rows) was counted as 837 of
1331 and printed a hint to fetch page 28. A page whose unclamped row
offset lands exactly on the total is now recognised as the last one, so
the trailer stays silent there. Shown is also clamped to the total.
6859eb7f37