--- a/mercurial/commands.py	Fri Dec 16 09:48:14 2016 -0800
+++ b/mercurial/commands.py	Sat Dec 17 19:36:40 2016 +0530
@@ -1892,7 +1892,7 @@
     fm.write('pythonexe', _("checking Python executable (%s)\n"),
              sys.executable)
     fm.write('pythonver', _("checking Python version (%s)\n"),
-             ("%s.%s.%s" % sys.version_info[:3]))
+             ("%d.%d.%d" % sys.version_info[:3]))
     fm.write('pythonlib', _("checking Python lib (%s)...\n"),
              os.path.dirname(os.__file__))