Update formatter_node.py

formatter_node.py

@@ -0,0 +1,8 @@
+def formatter_node(output):
+    """
+    Cleans up LLM output for exact match.
+    Removes prefixes, trims whitespace, ensures lowercase.
+    """
+    answer = output.strip()
+    # Optionally add more cleanup rules here
+    return answer