diff --git a/pymeos/collections/time/datespan.py b/pymeos/collections/time/datespan.py
index da04ffe5..5af0d47e 100644
--- a/pymeos/collections/time/datespan.py
+++ b/pymeos/collections/time/datespan.py
@@ -470,9 +470,7 @@ def distance(self, other: TimeDate) -> timedelta:
         elif isinstance(other, DateSet):
             return self.distance(other.to_spanset())
         elif isinstance(other, DateSpan):
-            return timedelta(
-                days=distance_datespan_datespan(self._inner, other._inner)
-            )
+            return timedelta(days=distance_datespan_datespan(self._inner, other._inner))
         elif isinstance(other, DateSpanSet):
             return timedelta(
                 days=distance_datespanset_datespan(self._inner, other._inner)