A cell's grid box claimed one row, so a w:vMerge reaching the table's last
row sat inside the banded region instead of on its bottom edge — and a band
declaring insideH nil then dropped the line. The merge extent is counted
before the covered rows are read.
Measured against LibreOffice: the bottom rule runs the full width under a
merged first column, which the editor now draws too.
Steffen Becker
9d494b2966