diff -r 31723cff35fa -r 03f7db5f8e71 mercurial/configitems.py
--- a/mercurial/configitems.py	Fri Oct 13 16:39:06 2017 +0200
+++ b/mercurial/configitems.py	Wed Oct 11 02:26:09 2017 +0200
@@ -498,6 +498,10 @@
 coreconfigitem('merge', 'preferancestor',
         default=lambda: ['*'],
 )
+coreconfigitem('pager', 'attend-.*',
+    default=dynamicdefault,
+    generic=True,
+)
 coreconfigitem('pager', 'ignore',
     default=list,
 )