Possible mistake in Per-Group Quantization

Short Course Q&A Quantization In Depth
1

In the per-group quantization video, the instructor explains this line of code:

assert t_shape[1] % group_size == 0

as: asserting that “each row is divisible by group size”.

However, t_shape[1] returns the number of columns, so if I understand correctly, this code asserts that the number of columns is divisible by group size.

2

The size of each row is the number of columns.

3

I agree, so I think it might be clearer if the explanation was: “the size of the row is divisible by group size”, or “the number of columns is divisible by group size”.