Custom loss demo should be updated

[BreezeHavana]

Doc request
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After the recent version update, if you define compute_loss in trainer, you need to pass in the parameter num_items_in_batch. But this is not mentioned in the documentation. I hope the documentation can be updated to avoid this confusing error.
https://huggingface.co/docs/transformers/v4.48.2/en/trainer

Additional context
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[alialvii]

Im happy to do this, can i please get this assigned to me?

[BreezeHavana]

auto reply