Fine-tune T5 on SQuAD
### System Info

I was trying to use the official command to evaluate T5 on SQuAD data, but where can I find the prediction file that contains the actual answer T5 generated?
  python run_seq2seq_qa.py \
  --model_name_or_path t5-small \
  --dataset_name squad \
  --context_column context \
  --question_column question \
  --answer_column answers \
  --do_eval \
  --max_seq_length 384 \
  --doc_stride 128 \
  --predict_with_generate \
  --output_dir /tmp/debug_seq2seq_squad/

### Who can help?

@sgugger

### Information

- [X] The official example scripts
- [ ] My own modified scripts

### Tasks

- [X] An officially supported task in the `examples` folder (such as GLUE/SQuAD, ...)
- [ ] My own task or dataset (give details below)

### Reproduction

NA

### Expected behavior

find the prediction file
I didn't verify manually, but I think you have to modify 

https://github.com/huggingface/transformers/blob/fc7ce2ebc52eccd8158a7feeeee11eb44f964937/examples/pytorch/question-answering/run_seq2seq_qa.py#L695-L706

in order to save the prediction (generation).<|||||>This issue has been automatically marked as stale because it has not had recent activity. If you think this still needs to be addressed please comment on this thread.

Please note that issues that do not follow the [contributing guidelines](https://github.com/huggingface/transformers/blob/main/CONTRIBUTING.md) are likely to be ignored.