py3: use absolute_import in test-minirst.py

tests/test-check-py3-compat.t

@@ -60,7 +60,6 b''
   tests/test-lrucachedict.py not using absolute_import
   tests/test-lrucachedict.py requires print_function
   tests/test-manifest.py not using absolute_import
-  tests/test-minirst.py not using absolute_import
   tests/test-minirst.py requires print_function
   tests/test-parseindex2.py not using absolute_import
   tests/test-parseindex2.py requires print_function

tests/test-minirst.py

@@ -1,5 +1,10 b''
-from pprint import pprint
-from mercurial import minirst
+from __future__ import absolute_import
+from pprint import (
+    pprint,
+)
+from mercurial import (
+    minirst,
+)
 
 def debugformat(text, form, **kwargs):
     if form == 'html':