casesmash: use absolute_import

contrib/casesmash.py

@@ -1,5 +1,9 b''
-import os, __builtin__
-from mercurial import util
+from __future__ import absolute_import
+import __builtin__
+import os
+from mercurial import (
+    util,
+)
 
 def lowerwrap(scope, funcname):
     f = getattr(scope, funcname)

tests/test-check-py3-compat.t

@@ -3,7 +3,6 b''
   $ cd "$TESTDIR"/..
 
   $ hg files 'set:(**.py)' | sed 's|\\|/|g' | xargs python contrib/check-py3-compat.py
-  contrib/casesmash.py not using absolute_import
   contrib/check-code.py not using absolute_import
   contrib/check-code.py requires print_function
   contrib/check-config.py not using absolute_import