fix indent

pipeline.py

@@ -11,7 +11,7 @@ class PreTrainedPipeline():
             "Please implement PreTrainedPipeline __init__ function"
         )
 
-     def __call__(self, inputs: str) -> List[List[Dict[str, float]]]:
+    def __call__(self, inputs: str) -> List[List[Dict[str, float]]]:
         """
         Args:
             inputs (:obj:`str`):