Apply ruff flake8-comprehensions (#21694)

examples/research_projects/codeparrot/scripts/pretokenizing.py

@@ -8,7 +8,7 @@ from transformers import AutoTokenizer, HfArgumentParser
 
 
 def tokenize(example):
-    output = dict()
+    output = {}
     output["input_ids"] = tokenizer(example["content"], truncation=False)["input_ids"]
     output["ratio_char_token"] = len(example["content"]) / len(output["input_ids"])
     return output