range_max argument in return_id_scaling_gride does not indicate the actual max data range

[diegodoimo]

Subject of the issue

Specify better the behaviour of range_max argument in return ID scaling gride

For some dataset (e.g. helm-mmlu-anatomy?) the range_max argument does behave properly: it computes one scale less than expected

[diegodoimo]

Also, add at the output of the ID methods the "scales" over which the IDs are computed (N, k) rather that the distances over which the IDs are computed