tests: make test-lrucachedict use absolute_import

tests/test-check-py3-compat.t

@@ -57,7 +57,6 b''
   tests/test-demandimport.py requires print_function
   tests/test-doctest.py not using absolute_import
   tests/test-hgwebdir-paths.py not using absolute_import
-  tests/test-lrucachedict.py not using absolute_import
   tests/test-lrucachedict.py requires print_function
   tests/test-trusted.py requires print_function
 

tests/test-lrucachedict.py

@@ -1,4 +1,8 b''
-from mercurial import util
+from __future__ import absolute_import
+
+from mercurial import (
+    util,
+)
 
 def printifpresent(d, xs, name='d'):
     for x in xs: