Fix formatting

lm_eval/filters/transformation.py

@@ -22,8 +22,9 @@ class UppercaseFilter(Filter):
 
         return [filter_set(resp) for resp in resps]
 
+
 class MapFilter(Filter):
-    def __init__(self, mapping_dict: dict = {}, default_value = None) -> None:
+    def __init__(self, mapping_dict: dict = {}, default_value=None) -> None:
         """
         Initializes the MapFilter with a given mapping dictionary and default value.