Rowspan and colspan 0 test

Correct tables

123
colspan 0
1rowspan 0
2
3
123
2both 0
3
1rowspan 03
22-3
33-3
1rowspan 0
22-3
3

Malformed tables

These tables have cells to the right of a cell with colspan="0". There is no correct rendering.

123
colspan 0x
123
2both 0x
3x