Issue #4239: adjust email examples not to use connect() and terminate with
quit() and not close().
diff --git a/Doc/includes/email-alternative.py b/Doc/includes/email-alternative.py
index d941323..82e3ffa 100644
--- a/Doc/includes/email-alternative.py
+++ b/Doc/includes/email-alternative.py
@@ -45,4 +45,4 @@
 # sendmail function takes 3 arguments: sender's address, recipient's address
 # and message to send - here it is sent as one string.
 s.sendmail(me, you, msg.as_string())
-s.close()
+s.quit()