diff -r ec765a71bd65 -r cc977ec0b8b9 mercurial/configitems.py
--- a/mercurial/configitems.py	Thu Oct 19 12:33:53 2017 +0200
+++ b/mercurial/configitems.py	Thu Oct 19 17:50:20 2017 +0200
@@ -369,6 +369,10 @@
 coreconfigitem('experimental', 'evolution.createmarkers',
     default=None,
 )
+coreconfigitem('experimental', 'evolution.effect-flags',
+    default=False,
+    alias=[('experimental', 'effect-flags')]
+)
 coreconfigitem('experimental', 'evolution.exchange',
     default=None,
 )
@@ -387,9 +391,6 @@
 coreconfigitem('experimental', 'nonnormalparanoidcheck',
     default=False,
 )
-coreconfigitem('experimental', 'effect-flags',
-    default=False,
-)
 coreconfigitem('experimental', 'exportableenviron',
     default=list,
 )