GitLab

* Fix weight decay masking in `run_flax_glue.py`

Issues with the previous implementation:
- The `dict` from `traverse_util.flatten_dict` has keys which are tuples of strings, not one long string with the path separated by periods.
- `optax.masked` applies the transformation wherever the mask is True, so the masks are flipped.
- Flax's LayerNorm calls the scale parameter `scale` not `weight`

* Fix formatting with black

* adapt results
Co-authored-by: Patrick von Platen <patrick@huggingface.co>