fix: Fix up regex str for better filtering

LLMs/training/train_grpo.py

@@ -77,7 +77,8 @@ def strict_format_reward_func(completions, **kwargs) -> list[float]:
 
 def soft_format_reward_func(completions, **kwargs) -> list[float]:
     """Reward function that checks if the completion has a specific format."""
-    pattern = r"<reasoning>.*?</reasoning>\s*<answer>.*?</answer>"
+    #pattern = r"<reasoning>.*?</reasoning>\s*<answer>.*?</answer>"
+    pattern = r"<reasoning>[\s\S]*</reasoning>\s*<answer>.*?</answer>"
     responses = [completion[0]["content"] for completion in completions]
     matches = [re.match(pattern, r, flags=re.DOTALL) for r in responses] 
     return [0.5 if match else 0.0 for match in matches]