diff --git a/nikola/image_processing.py b/nikola/image_processing.py
index 49bd989ab..33e3640df 100644
--- a/nikola/image_processing.py
+++ b/nikola/image_processing.py
@@ -44,6 +44,7 @@
 
 class ImageProcessor(object):
     """Apply image operations."""
+
     logger: logging.Logger
     dates: typing.Dict[str, datetime.datetime]