Fix formatted_int printing 1,000.0K / 1,000.0M at unit boundaries - #14342

Bug

unsloth.utils.hf_hub.formatted_int picks the unit from the raw value and then rounds to one decimal. A value just under a million or a billion picks the smaller unit, then rounds up to 1000.0 of it:

formatted_int(999_999)      # '1,000.0K', should be '1.0M'
formatted_int(999_999_999)  # '1,000.0M', should be '1.0B'

Fix

For each unit, check whether the value rounded to one decimal stays below 1000. If it doesn't, move to the next unit. Output for all other values is the same as before. The raw thresholds (< 1000 prints the integer, otherwise K/M/B) are also unchanged.

Test

tests/test_hf_hub_formatted_int.py loads unsloth/utils/hf_hub.py by path, so it doesn't import torch or the full package. It checks values around each boundary. The 999_999 and 999_999_999 cases fail before the fix and pass after. The other eight pass both before and after.

python -m pytest -q --noconftest tests/test_hf_hub_formatted_int.py   # 10 passed

AI assistance: I used an AI coding assistant (Grok Bot) to help find and write this fix. I reviewed the change and ran the test myself.