[gnome-user-docs] Fixed missing word

[Marek Černocký <mcernocky src gnome org>]

commit 254a9c166b553ee21a746781c766dcb07f84a9e5
Author: Marek Cernocky <marek_cernocky conel cz>
Date:   Tue Oct 31 19:05:21 2017 +0100

    Fixed missing word

 system-admin-guide/C/logout-automatic.page |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/system-admin-guide/C/logout-automatic.page b/system-admin-guide/C/logout-automatic.page
index f415ae6..63bc55a 100644
--- a/system-admin-guide/C/logout-automatic.page
+++ b/system-admin-guide/C/logout-automatic.page
@@ -99,7 +99,7 @@ sleep-inactive-ac-type='logout'
     <item>
       <title><code>org.gnome.settings-daemon.plugins.power.sleep-inactive-battery-timeout</code></title>
       <p>The number of seconds that the computer needs to be inactive before it
-      goes to sleep if it is running from power.</p>
+      goes to sleep if it is running from battery power.</p>
     </item>
     <item>
       <title><code>org.gnome.settings-daemon.plugins.power.sleep-inactive-battery-type</code></title>