mail: fix debug print, which appears to have been broken for a long time

I noticed this when trying to debug very mysterious dummysmtpd
problems. It turns out you can set self.debuglevel to a number greater
than 0 and have smtplib print helpful debug output, but this output on
our side of things was broken.

Differential Revision: https://phab.mercurial-scm.org/D4218

mercurial/mail.py

@@ -73,7 +73,7 b' class SMTPS(smtplib.SMTP):'
 
     def _get_socket(self, host, port, timeout):
         if self.debuglevel > 0:
-            self._ui.debug('connect: %r\n' % (host, port))
+            self._ui.debug('connect: %r\n' % ((host, port),))
         new_socket = socket.create_connection((host, port), timeout)
         new_socket = sslutil.wrapsocket(new_socket,
                                         self.keyfile, self.certfile,