feat: lower default source length

seq2seq/run_seq2seq_flax.py

@@ -152,7 +152,7 @@ class DataTrainingArguments:
         metadata={"help": "An optional input predict data file to do prediction on (a text file)."},
     )
     max_source_length: Optional[int] = field(
-        default=1024,
+        default=128,
         metadata={
             "help": "The maximum total input sequence length after tokenization. Sequences longer "
             "than this will be truncated, sequences shorter will be padded."