--- a/tests/list-tree.py	Sat Oct 05 10:29:34 2019 -0400
+++ b/tests/list-tree.py	Sun Oct 06 09:45:02 2019 -0400
@@ -10,6 +10,7 @@
 ap.add_argument('path', nargs='+')
 opts = ap.parse_args()
 
+
 def gather():
     for p in opts.path:
         if not os.path.exists(p):
@@ -24,4 +25,5 @@
         else:
             yield p
 
+
 print('\n'.join(sorted(gather(), key=lambda x: x.replace(os.path.sep, '/'))))