Fix incorrect unk_id assignment

#16

self.unk_id is currently incorrectly assigned the ID of pad_token. Inferring from the original comment, the intention was likely to use self.unk_token (the second-to-last special token) to fetch its correct ID; this PR applies this correction.
However, I think this fix might affect model performance without retraining.

Ready to merge
This branch is ready to get merged automatically.

Sign up or log in to comment