Update pigeonhole_sort.py

MaximSmolskiy · web-flow · commit 7456a84856e7 · 2026-04-11T00:41:37.000+03:00
diff --git a/sorts/pigeonhole_sort.py b/sorts/pigeonhole_sort.py
@@ -12,6 +12,7 @@ def pigeonhole_sort(a):
     True
 
     >>> pigeonhole_sort([])
+    None
     """
     # if not a:
     #    return  # this handles empty list
