Update app.py

app.py

@@ -484,6 +484,8 @@ class TextToSQLSystem:
 
     # in class TextToSQLSystem:
 
+    # in class TextToSQLSystem:
+
     def _validate_and_fix_sql(self, question: str, raw_response: str) -> Tuple[Optional[str], str]:
         """
         (V23 / 统一实体识别版)