[rygel] docs: Fix a typo

[Murray Cumming <murrayc src gnome org>]

commit 9e3f4a0546440dbd3b1503b227d41ada04b50c8e
Author: Murray Cumming <murrayc murrayc com>
Date:   Tue Jan 22 16:02:28 2013 +0100

    docs: Fix a typo

 .../gtkdoc/implementing-server-plugins.xml         |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/doc/reference/librygel-server/gtkdoc/implementing-server-plugins.xml b/doc/reference/librygel-server/gtkdoc/implementing-server-plugins.xml
index 7a6558a..fe619df 100644
--- a/doc/reference/librygel-server/gtkdoc/implementing-server-plugins.xml
+++ b/doc/reference/librygel-server/gtkdoc/implementing-server-plugins.xml
@@ -71,7 +71,7 @@ implemented in Vala.
 
 <para>The <classname>RygelMediaExportPlugin</classname> class, derived from <link linkend="RygelMediaServerPlugin">RygelMediaServerPlugin</link>, simply instantiates its <classname>RygelMediaExportRootContainer</classname> class, derived from <link linkend="RygelMediaContainer">RygelMediaContainer</link>, providing it to the base class as the root container.</para>
 
-<para>The <classname>RygelMediaExportRootContainer</classname> creates an instance of a <classname>RygelMediaExportMediaCache</classname> class and a <classname>RygelMediaExportHarvester</classname> class. The harvester finds files on the filesystem, and stores them in the media cache, which uses SQLite to keep trak of them.</para>
+<para>The <classname>RygelMediaExportRootContainer</classname> creates an instance of a <classname>RygelMediaExportMediaCache</classname> class and a <classname>RygelMediaExportHarvester</classname> class. The harvester finds files on the filesystem, and stores them in the media cache, which uses SQLite to keep track of them.</para>
 
 <para><classname>RygelMediaExportRootContainer</classname> informs the media cache that it should have a child container for the media content as organised on the filesystem, and additionally some virtual folders for Music, Pictures, Video and Playlists, with further sub-divisions under these, for instance by publication year. These containers are added to the media cache via instances of the <classname>RygelMediaExportNullContainer</classname> class, but that is just to simplify the media cache API and these instances then serve no further purpose. The virtual folders are re-added whenever the filesystem's container is updated, so that they can show the updated 
 content, though that is not particularly efficient.</para>