tests: test-dispatch use absolute_import

tests/test-check-py3-compat.t

@@ -92,7 +92,6 b''
   tests/test-context.py requires print_function
   tests/test-demandimport.py not using absolute_import
   tests/test-demandimport.py requires print_function
-  tests/test-dispatch.py not using absolute_import
   tests/test-dispatch.py requires print_function
   tests/test-doctest.py not using absolute_import
   tests/test-duplicateoptions.py not using absolute_import

tests/test-dispatch.py

@@ -1,5 +1,8 b''
+from __future__ import absolute_import
 import os
-from mercurial import dispatch
+from mercurial import (
+    dispatch,
+)
 
 def testdispatch(cmd):
     """Simple wrapper around dispatch.dispatch()