GitLab

update the arguments `add_prefix_space` and `trim_offsets` in `backend_tokenizer.post_processor` of `RobertaTokenizerFast` (#14752)

* add tests

* change post-processor, pre-tokenizer and decoder (can't update decoder)

* update test (remove decoder which doesn't depend on trim and add_prefix)

* just update the post_processor

* fix change

* `trim_offsets` has no influence on `pre_tokenizer`

* remove a test that need some input from the `tokenizers` lib maintainers

* format

* add new test offsets roberta

* polish comments