* Add seq2seq example for QnA on SQuAD Dataset.
* Changes from review - Fixing styling mistakes.
* Added how to example in README, simplified the access to dataset's preprocess function.
* Added tests for the seq2seq QA example.
* Change dataset column name to fix tests.
* Fix test command mistake.
* Add missing argument 'ignore_pad_token_for_loss' from DataTrainingArguments.
* Add missing argument 'num_beams' from DataTrainingArguments.
* Fix processing of output predicted token ids so that tokenizer decode gets appropriate input. Updated assertion conditions on the tests.
* Base move
* Examples reorganization
* Update references
* Put back test data
* Move conftest
* More fixes
* Move test data to test fixtures
* Update path
* Apply suggestions from code review
Co-authored-by: Lysandre Debut <lysandre@huggingface.co>
* Address review comments and clean
Co-authored-by: Lysandre Debut <lysandre@huggingface.co>