This test checks the behaviour in the collapsing border model when table-cells are missing.

cell A1 cell B1 cell A2 cell B2 cell C2 cell A3 cell C3 cell C4 cell A5 cell C5 cell B6 cell C6 cell A1 cell A1 cell A1 cell A1 cell A1 cell A1 cell A1 cell A1 cell B1