This empties a row (the second). It should be removed. This demonstrates a bug: the two cells that contained the ends of the selection aren't given a placeholder and so appear differently than the other emptied cells.

1 | 2 | 3
4 | 5 | 6
7 | 8 | 9

This empties a row (the second), but it still contains the selection and so shouldn't be removed.

1 | 2 | 3
4 | 5 | 6
7 | 8 | 9

This empties the first row, it should be removed.

Hello world!

1 | 2 | 3
4 | 5 | 6
7 | 8 | 9