[run_clm] clarify why we get the tokenizer warning on long input (#11145)
[run_clm] clarify why we get the tokenizer warning on long input (#11145)

* clarify why we get the warning here

* Update examples/language-modeling/run_clm.py

Co-authored-by: Sylvain Gugger <222c4d44cc8ec39802c192ed0aa3f97cdb77ff4e@users.noreply.github.com>

* wording

* style

Co-authored-by: Sylvain Gugger <222c4d44cc8ec39802c192ed0aa3f97cdb77ff4e@users.noreply.github.com>
huggingface/transformers,huggingface/transformers,huggingface/pytorch-transformers,huggingface/transformers,huggingface/transformers