mercurial/stack.py

--- a/mercurial/stack.py	Fri Oct 04 15:53:45 2019 -0400
+++ b/mercurial/stack.py	Sat Oct 05 10:29:34 2019 -0400
@@ -7,6 +7,7 @@
 
 from __future__ import absolute_import
 
+
 def getstack(repo, rev=None):
     """return a sorted smartrev of the stack containing either rev if it is
     not None or the current working directory parent.