transformers

6488cabb - Clarify that causal LM labels are shifted internally (#44642)

Clarify that causal LM labels are shifted internally (#44642) * Document label shifting for ForCausalLM models via ModelForArgs * Mention shift_labels in ForCausalLM labels docstring --------- Co-authored-by: joshuaswanson <joshuaswanson@users.noreply.github.com>