More syntax warnings (#1944)

* move use_modelscope to _utils

* fix

* Update _utils.py

* Update loader.py

---------

Co-authored-by: Daniel Han <danielhanchen@gmail.com>

unsloth/models/rl.py

@@ -536,7 +536,7 @@ def patch_functions(RLTrainer, trainer_file, RLTrainer_name, all_imports, import
     if "args.use_vllm" in init and "model" in init and "args" in init:
         # .*? matches first match. .+? matches final match.
         replacer = re.findall(
-            "def __init__\(.*?\).*?\:\n",
+            r"def __init__\(.*?\).*?\:\n",
             init,
             flags = re.MULTILINE | re.DOTALL,
         )

unsloth/tokenizer_utils.py

@@ -945,7 +945,7 @@ def patch_sft_trainer_tokenizer():
         if replacer is None:
             # .*? matches first match. .+? matches final match.
             replacer = re.findall(
-                f"def {function_name}\(.*?\).*?\:\n",
+                f"def {function_name}" + r"\(.*?\).*?\:\n",
                 function,
                 flags = re.MULTILINE | re.DOTALL,
             )