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* Generation doc * MBartForConditionalGeneration (#6441) * add MBartForConditionalGeneration * style * rebase and fixes * add mbart test in TEST_FILES_WITH_NO_COMMON_TESTS * fix docs * don't ignore mbart * doc * fix mbart fairseq link * put mbart before bart * apply doc suggestions * Use hash to clean the test dirs (#6475) * Use hash to clean the test dirs * Use hash to clean the test dirs * Use hash to clean the test dirs * fix * [EncoderDecoder] Add Cross Attention for GPT2 (#6415) * add cross attention layers for gpt2 * make gpt2 cross attention work * finish bert2gpt2 * add explicit comments * remove attention mask since not yet supported * revert attn mask in pipeline * Update src/transformers/modeling_gpt2.py Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com> * Update src/transformers/modeling_encoder_decoder.py Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com> Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com> * Sort unique_no_split_tokens to make it deterministic (#6461) * change unique_no_split_tokens's type to set * use sorted list instead of set * style * Import accuracy_score (#6480) * Apply suggestions from code review Co-authored-by: Lysandre Debut <lysandre@huggingface.co> * Address comments * Styling * Generation doc * Apply suggestions from code review Co-authored-by: Lysandre Debut <lysandre@huggingface.co> * Address comments * Styling Co-authored-by: Suraj Patil <surajp815@gmail.com> Co-authored-by: Kevin Canwen Xu <canwenxu@126.com> Co-authored-by: Patrick von Platen <patrick.v.platen@gmail.com> Co-authored-by: Quentin Lhoest <42851186+lhoestq@users.noreply.github.com> Co-authored-by: gijswijnholds <gijswijnholds@gmail.com> Co-authored-by: Lysandre Debut <lysandre@huggingface.co>