A minor bug in sliding_window()

[WenjieDu]

1. System Info

PyPOTS v0.6

2. Information

• The official example scripts
• My own created scripts

3. Reproduction

The calculation below is wrong

PyPOTS/pypots/data/utils.py

Line 197 in 0fbdcd6

if total_len - start_indices[-1] * sliding_len < window_len:

4. Expected behavior

The last complete sample may get removed unexpectedly.