try another landscape approach

.landscape.yml

@@ -3,14 +3,13 @@ pylint:
         # We use this a lot (e.g. via document._meta)
         - protected-access
 
-    options:
-        additional-builtins:
-            # add xrange and long as valid built-ins. In Python 3, xrange is
-            # translated into range and long is translated into int via 2to3 (see
-            # "use_2to3" in setup.py). This should be removed when we drop Python
-            # 2 support (which probably won't happen any time soon).
-            - xrange
-            - long
+    additional-builtins:
+        # add xrange and long as valid built-ins. In Python 3, xrange is
+        # translated into range and long is translated into int via 2to3 (see
+        # "use_2to3" in setup.py). This should be removed when we drop Python
+        # 2 support (which probably won't happen any time soon).
+        - xrange
+        - long
 
 ignore-paths:
     - benchmark.py