Fix gradient checkpointing bug in trocr (#22126)
* Fix gradient checkpointing bug in trocr
* Fix format
* Update src/transformers/models/trocr/modeling_trocr.py
Co-authored-by: Younes Belkada <49240599+younesbelkada@users.noreply.github.com>
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Co-authored-by: Younes Belkada <49240599+younesbelkada@users.noreply.github.com>
