For bordered table, here's the code:

[code][table=bordered][row]
[cell]A[/cell][cell][right]B[/right][/cell]
[/row][/table][/code]

[quote][table=bordered][row]
[cell]A[/cell][cell][right]B[/right][/cell]
[/row][/table][/quote]

However, even if you remove the border command, the bottom line is still visible:

[quote][table][row]
[cell]A[/cell][cell][right]B[/right][/cell]
[/row][/table][/quote]

Hope this helps.