diff --git a/xontrib/mplhooks.py b/xontrib/mplhooks.py
index 7d966ec..76d831b 100644
--- a/xontrib/mplhooks.py
+++ b/xontrib/mplhooks.py
@@ -1,4 +1,5 @@
 """Matplotlib hooks, for what its worth."""
+
 import shutil
 from io import BytesIO