[gnome-user-docs] Add comment to shell-notification

[Ekaterina Gerasimova <kat src gnome org>]

commit 5e91e58208c62362a5fb63db13e4a9190de92850
Author: Ekaterina Gerasimova <kittykat3756 gmail com>
Date:   Mon Mar 2 22:38:02 2015 +0000

    Add comment to shell-notification

 gnome-help/C/shell-notifications.page |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gnome-help/C/shell-notifications.page b/gnome-help/C/shell-notifications.page
index 7bed1b0..23f8733 100644
--- a/gnome-help/C/shell-notifications.page
+++ b/gnome-help/C/shell-notifications.page
@@ -10,6 +10,7 @@
     <revision pkgversion="3.8.0" version="0.3" date="2013-04-23" status="review"/>
     <revision pkgversion="3.10" date="2013-11-02" status="review"/>
     <revision pkgversion="3.13.92" date="2014-09-22" status="review"/>
+    <revision pkgversion="3.16" date="2015-03-02" status="outdated"/>
 
     <credit type="author">
       <name>Marina Zhurakhinskaya</name>
@@ -32,6 +33,7 @@
 
 <title>Notifications and the message tray</title>
 
+  <!--TODO: most of this has changed for 3.16 -->
 <section id="what">
   <title>What is a notification?</title>