Update test/unit/test_webdav.py

Co-authored-by: Jan Klötzke <jan@kloetzke.net>

Author: rhubert

test/unit/test_webdav.py

@@ -179,7 +179,7 @@ def checkyEntry(entry, is_dir, paths):
 
         def touch(path):
             with open(path,'a') as f:
-                None
+                pass
 
         with HttpServerMock(self.dir) as srv:
             # create some simple directory structure