There should be no table between this paragraph and the following paragraph.

1 2
3 4

The following table should only have one row, "3 4", in it:

1 2
3 4

In the following table, the first row's first cell should be "2", the second cell should be empty, and the second row should be "3 4":

1 2
3 4

The following table should be normal, with two rows and two columns, "1 2 3 4". The background should not be green.

1 2
3 4

The following table should also be normal, with two rows and two columns, "1 2 3 4". The background should not be green.

1 2
3 4

In the following table, the first row's first cell should be "1", the second cell should be empty, and the second row should be "3 4":

1
2
3 4

Along the right edge of the viewport, there should be 6 equally sized green boxes, some with text in them. The text may overflow out of them. They should be equally spaced, going down the viewport. The first should contain the numbers 1 to 4, in the tabular format used above. The second should contain just the numbers 1 and 2. The third should contain the number 1. The fourth and fifth should be empty, and finally the sixth should have the number 1 in it.