diff --git a/radicale/xmlutils.py b/radicale/xmlutils.py
index 3524f46..bc87d14 100644
--- a/radicale/xmlutils.py
+++ b/radicale/xmlutils.py
@@ -222,7 +222,7 @@ def _time_range_match(vobject_item, filter_, child_name):
         dtstart = child.dtstart.value
         if isinstance(dtstart, datetime) and not dtstart.tzinfo:
             dtstart = dtstart.replace(tzinfo=timezone.utc)
-                
+
         if not isinstance(dtstart, datetime):
             dtstart_is_datetime = False
             # TODO: changing dates to datetimes may be wrong because of tz
@@ -240,7 +240,7 @@ def _time_range_match(vobject_item, filter_, child_name):
                     tzinfo=timezone.utc)
             if isinstance(dtend, datetime) and not dtend.tzinfo:
                 dtend = dtend.replace(tzinfo=timezone.utc)
-   
+
             return start < dtend and end > dtstart
         elif duration is not None:
             duration = duration.value