diff --git a/zipline/gens/composites.py b/zipline/gens/composites.py
index 88976bb0..4d448641 100644
--- a/zipline/gens/composites.py
+++ b/zipline/gens/composites.py
@@ -31,6 +31,7 @@ def date_sorted_sources(*sources):
     # Guarantee the flat stream will be sorted by date, using source_id as
     # tie-breaker, which is fully deterministic (given deterministic string 
     # representation for all args/kwargs)
+
     return date_sort(stream_in, names)