mercurial/configitems.py

--- a/mercurial/configitems.py	Wed Oct 11 03:53:58 2017 +0200
+++ b/mercurial/configitems.py	Wed Oct 11 03:54:05 2017 +0200
@@ -194,6 +194,9 @@
 coreconfigitem('email', 'bcc',
     default=None,
 )
+coreconfigitem('email', 'cc',
+    default=None,
+)
 coreconfigitem('email', 'charsets',
     default=list,
 )