debugshell: use absolute_import

contrib/debugshell.py

@@ -1,9 +1,10 b''
 # debugshell extension
 """a python shell with repo, changelog & manifest objects"""
 
-import sys
+from __future__ import absolute_import
+import code
 import mercurial
-import code
+import sys
 from mercurial import (
     cmdutil,
     demandimport,

tests/test-check-py3-compat.t

@@ -5,7 +5,6 b''
   $ hg files 'set:(**.py)' | sed 's|\\|/|g' | xargs python contrib/check-py3-compat.py
   contrib/check-code.py not using absolute_import
   contrib/check-code.py requires print_function
-  contrib/debugshell.py not using absolute_import
   contrib/import-checker.py not using absolute_import
   contrib/import-checker.py requires print_function
   contrib/memory.py not using absolute_import