diff --git a/spacy/ml/richfeatureextractor.pyi b/spacy/ml/richfeatureextractor.pyi
index 3aa357d01..d89d11f19 100644
--- a/spacy/ml/richfeatureextractor.pyi
+++ b/spacy/ml/richfeatureextractor.pyi
@@ -3,7 +3,7 @@ from ..tokens import Doc
 def get_character_combination_hashes(
     *,
     doc: Doc,
-    case_sensitive: bool, 
+    case_sensitive: bool,
     p_lengths: bytes,
     s_lengths: bytes,
-):
\ No newline at end of file
+): ...