fix typo in tweakdefaults

Summary: We have `ui.warn` but not `ui.warning`, which is probably what the original author meant to write. We don't seem to hit this code often anyways.

Differential Revision: D66730578

fbshipit-source-id: ced4a40f8f472f60c19f4a83367888558809e603

eden/scm/sapling/ext/tweakdefaults.py

@@ -168,7 +168,7 @@ def _analyzewrap(orig, x):
             "tweakdefaults: _computeobsoletenotrebased or "
             + "_checkobsrebase are not what we expect them to be"
         )
-        ui.warning(msg)
+        ui.warn(msg)
 
     try:
         remotenames = extensions.find("remotenames")