diff -r cd9cf641043a -r 8467569991cb mercurial/commands.py
--- a/mercurial/commands.py	Mon Feb 06 23:06:32 2017 -0500
+++ b/mercurial/commands.py	Mon Feb 06 23:06:59 2017 -0500
@@ -4821,6 +4821,7 @@
     Returns 0 on success.
     """
 
+    ui.pager('summary')
     ctx = repo[None]
     parents = ctx.parents()
     pnode = parents[0].node()