py3: make hgmanpage use absolute_import

doc/hgmanpage.py

@@ -41,12 +41,18 b' A unix-like system keeps an index of the'
 by the command whatis or apropos.
 
 """
+from __future__ import absolute_import
 
 __docformat__ = 'reStructuredText'
 
+import inspect
 import re
 
-from docutils import nodes, writers, languages
+from docutils import (
+    languages,
+    nodes,
+    writers,
+)
 try:
     import roman
 except ImportError:

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
-  doc/hgmanpage.py not using absolute_import
   hgext/color.py not using absolute_import
   hgext/eol.py not using absolute_import
   hgext/extdiff.py not using absolute_import