py3: make color use absolute_import

hgext/color.py

@@ -153,10 +153,18 b' the pager is active::'
 If ``pagermode`` is not defined, the ``mode`` will be used.
 '''
 
-import os
+from __future__ import absolute_import
 
-from mercurial import cmdutil, commands, dispatch, extensions, subrepo, util
-from mercurial import ui as uimod
+import os
+from mercurial import (
+    cmdutil,
+    commands,
+    dispatch,
+    extensions,
+    subrepo,
+    ui as uimod,
+    util,
+)
 from mercurial.i18n import _
 
 cmdtable = {}
@@ -523,7 +531,8 b' def debugcolor(ui, repo, **opts):'
 if os.name != 'nt':
     w32effects = None
 else:
-    import re, ctypes
+    import ctypes
+    import re
 
     _kernel32 = ctypes.windll.kernel32
 

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
-  hgext/color.py not using absolute_import
   hgext/eol.py not using absolute_import
   hgext/extdiff.py not using absolute_import
   hgext/factotum.py not using absolute_import