--- a/tests/mockblackbox.py	Sat Oct 05 10:29:34 2019 -0400
+++ b/tests/mockblackbox.py	Sun Oct 06 09:45:02 2019 -0400
@@ -1,14 +1,15 @@
 from __future__ import absolute_import
-from mercurial.utils import (
-    procutil,
-)
+from mercurial.utils import procutil
 
 # XXX: we should probably offer a devel option to do this in blackbox directly
 def getuser():
     return b'bob'
+
+
 def getpid():
     return 5000
 
+
 # mock the date and user apis so the output is always the same
 def uisetup(ui):
     procutil.getuser = getuser