[zenity] Fix typo in documentation

[Arx Henrique Pereira da Cruz <arxcruz src gnome org>]

commit 1cdee563a1599d00539f1dc0060c3ee0825274ed
Author: Anders Jonsson <anders jonsson norsjovallen se>
Date:   Wed Apr 1 15:26:48 2015 +0200

    Fix typo in documentation

 help/C/notification.page |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/help/C/notification.page b/help/C/notification.page
index 62a63d8..01a504e 100644
--- a/help/C/notification.page
+++ b/help/C/notification.page
@@ -15,7 +15,7 @@
     </item>
     <item>
       <title><cmd>--listen</cmd>=icon: '<var>text</var>', message: '<var>text</var>', tooltip: 
'<var>text</var>', visible: '<var>text</var>',</title>
-      <p>Listens for commands at standard input. At least one command must be specified. Commands are comma 
seperated. A command must be followed by a colon and a value. </p>
+      <p>Listens for commands at standard input. At least one command must be specified. Commands are comma 
separated. A command must be followed by a colon and a value. </p>
       <note style="tip">
         <p>The <cmd>icon</cmd> command also accepts four stock icon values such as <var>error</var>, 
<var>info</var>, <var>question</var> and <var>warning</var>.</p>
       </note>
@@ -51,4 +51,4 @@
     <media type="image" mime="image/png" src="figures/zenity-notification-listen-screenshot.png"/>
   </figure>
 
-</page>
\ No newline at end of file
+</page>