diff -r df1a29ec45bf -r a95c975f42e3 mercurial/mail.py
--- a/mercurial/mail.py	Thu Oct 15 20:36:12 2015 -0400
+++ b/mercurial/mail.py	Wed Oct 14 22:29:03 2015 -0400
@@ -127,7 +127,7 @@
     else:
         defaultport = 25
     mailport = util.getport(ui.config('smtp', 'port', defaultport))
-    ui.note(_('sending mail: smtp host %s, port %s\n') %
+    ui.note(_('sending mail: smtp host %s, port %d\n') %
             (mailhost, mailport))
     s.connect(host=mailhost, port=mailport)
     if starttls: