Correct validation_split_percentage argument from int (ex:5) to float (0.05) (#12897)
* Fixed train_test_split test_size argument
* `Seq2SeqTrainer` set max_length and num_beams only when non None (#12899)
* set max_length and num_beams only when non None
* fix instance variables
* fix code style
* [FLAX] Minor fixes in CLM example (#12914)
* readme: fix retrieval of vocab size for flax clm example
* examples: fix flax clm example when using training/evaluation files
* Fix module path for symbolic_trace example
Co-authored-by: cchen-dialpad <47165889+cchen-dialpad@users.noreply.github.com>
Co-authored-by: Stefan Schweter <stefan@schweter.it>
Co-authored-by: Sylvain Gugger <sylvain.gugger@gmail.com>