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Update llama2.md

* add a warning=True tip to the Llama2 doc

* code llama needs a tip too

* doc nit

* build PR doc

* doc nits
Co-authored-by: Lysandre <lysandre@huggingface.co>

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Co-authored-by: Lysandre <lysandre@huggingface.co>

* docs: feat: model resources for llama2
Co-authored-by: Woojun Jung <hello_984@naver.com>

* fix: add description for dpo and rearrange posts

* docs: feat: add llama2 notebook resources

* style: one liners for each resource
Co-Authored-By: Woojun Jung <46880056+jungnerd@users.noreply.github.com>
Co-Authored-By: Kihoon Son <75935546+kihoon71@users.noreply.github.com>

* Apply suggestions from code review
Co-authored-by: Steven Liu <59462357+stevhliu@users.noreply.github.com>

* Fix typo
Co-authored-by: Steven Liu <59462357+stevhliu@users.noreply.github.com>

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Co-authored-by: Woojun Jung <hello_984@naver.com>
Co-authored-by: Woojun Jung <46880056+jungnerd@users.noreply.github.com>
Co-authored-by: Kihoon Son <75935546+kihoon71@users.noreply.github.com>
Co-authored-by: Steven Liu <59462357+stevhliu@users.noreply.github.com>

`groupe` -> `grouped`

Update llama2.md

 Fix typos in the llama2 model doc

* add llama

* add other readmes

* update padding id in readme

* add link to paper

* fix paths and tokenizer

* more nits

* styling

* fit operation in 2 lines when possible

* nits

* Apply suggestions from code review
Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>

* add form

* update reademe

* update readme, we don't have a default pad token

* update test and tokenization

* LLaMA instead of Llama

* nits

* add expected text

* add greeedy output

* styling

* Update src/transformers/models/llama/modeling_llama.py
Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>

* sequential device map

* skip relevant changes

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Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>