cmd = 0 Clear tab stops.
If cmd is 0, set the column that the cursor is on to be not a tab stop.
IF cmd is 3, remove all tab stops.
cmd = 5 is an alias for cmd = 3.
cmd = 5 is an alias for cmd = 3.cmd = 2 is an alias for cmd = 3.If cmd is 0 and the cursor is in pending wrap state, this sequence does not have any effect.
TODO: If cmd is 3 tab stops beyond the end of the screen might not be cleared? (might be observable after later resize)
🛆 With `cmd´ = 0, uses current cursor column modulo 256 as tab position to erase.