contrib/lisp/org-contacts.el: Add a complex org-contacts template to the file header

* contrib/lisp/org-contacts.el: Add a complex org-contacts template to
the file header, which can help users to know all the org-contacts
properties quickly.

contrib/lisp/org-contacts.el

@@ -25,7 +25,7 @@
 
 ;; This file contains the code for managing your contacts into Org-mode.
 
-;; To enter new contacts, you can use `org-capture' and a template just like
+;; To enter new contacts, you can use `org-capture' and a minimal template just like
 ;; this:
 
 ;;         ("c" "Contacts" entry (file "~/Org/contacts.org")
@@ -34,6 +34,22 @@
 ;; :EMAIL: %(org-contacts-template-email)
 ;; :END:")))
 ;;
+;; You can also use a complex template, for example:
+;;
+;;         ("c" "Contacts" entry (file "~/Org/contacts.org")
+;;          "* %(org-contacts-template-name)
+;; :PROPERTIES:
+;; :EMAIL: %(org-contacts-template-email)
+;; :PHONE:
+;; :ALIAS:
+;; :NICKNAME:
+;; :IGNORE:
+;; :ICON:
+;; :NOTE:
+;; :ADDRESS:
+;; :BIRTHDAY:
+;; :END:")))
+;;
 ;;; Code:
 
 (eval-when-compile