GitLab

* group_beam_search now works correctly

* add argument descriptions

* add a comment

* format

* make style

* change comment

* Update src/transformers/generation/beam_search.py
Co-authored-by: Joao Gante <joaofranciscocardosogante@gmail.com>

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Co-authored-by: shogo.fujita <shogo.fujita@legalontech.jp>
Co-authored-by: Joao Gante <joaofranciscocardosogante@gmail.com>