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* add new test

* add a feature to same the sentencepiece tokenizer model when the init file was deleted

* update marian

* update m2m_100

* fix marian

* update speech to text

* override test for layoutxlm

* fix saving bartpho

* remove harcoded values bartpho

* special token string version

* finish bartpho

* override layoutxml test

* add mbart

* move special tokens list

* format

* Revert "format"

This reverts commit 37a40df37903a932c2f951cbd33acb684246bae7.

* simplify list of string of special tokens

* Re-write `self.fairseq_tokens_to_ids ` initialization logic with special tokens
Co-authored-by: Sylvain Gugger <sylvain.gugger@gmail.com>
Co-authored-by: Sylvain Gugger <sylvain.gugger@gmail.com>