--- a/feed.xml
+++ b/feed.xml
@@ -2,91 +2,91 @@
 
 <rss version="2.0">
 
-    <channel>
+  <channel>
 
-        <title>Maxima</title>
-        <description>A Computer Algebra System</description>
-        <language>en</language>
-        <link>http://maxima.sourceforge.net/</link>
-        <ttl>60</ttl>
+    <title>Maxima</title>
+    <description>A Computer Algebra System</description>
+    <language>en</language>
+    <link>http://maxima.sourceforge.net/</link>
+    <ttl>60</ttl>
 
-        <item>
-            <title>Maxima 5.18</title>
-            <link>http://maxima.sourceforge.net/download.html</link>
-            <guid isPermaLink="false">2009-04-26</guid>
-            <pubDate>Sat, 25 Apr 2009 15:48:34 -0600</pubDate>
-        </item>
+    <item>
+      <title>Maxima 5.18</title>
+      <link>http://maxima.sourceforge.net/download.html</link>
+      <guid isPermaLink="false">2009-04-26</guid>
+      <pubDate>Sat, 25 Apr 2009 15:48:34 -0600</pubDate>
+    </item>
 
-        <item>
-            <title>Maxima 5.17.1</title>
-            <link>http://maxima.sourceforge.net/download.html</link>
-            <guid isPermaLink="false">2008-12-26</guid>
-            <pubDate>Fri, 26 Dec 2008 10:13:59 -0600</pubDate>
-        </item>
+    <item>
+      <title>Maxima 5.17.1</title>
+      <link>http://maxima.sourceforge.net/download.html</link>
+      <guid isPermaLink="false">2008-12-26</guid>
+      <pubDate>Fri, 26 Dec 2008 10:13:59 -0600</pubDate>
+    </item>
 
-        <item>
-            <title>Maxima 5.16.3</title>
-            <link>http://maxima.sourceforge.net/download.html</link>
-            <guid isPermaLink="false">2008-08-29</guid>
-            <pubDate>Fri, 29 Aug 2008 08:47:56 -0600</pubDate>
-        </item>
+    <item>
+      <title>Maxima 5.16.3</title>
+      <link>http://maxima.sourceforge.net/download.html</link>
+      <guid isPermaLink="false">2008-08-29</guid>
+      <pubDate>Fri, 29 Aug 2008 08:47:56 -0600</pubDate>
+    </item>
 
-        <item>
-            <title>Maxima 5.15.0</title>
-            <link>http://maxima.sourceforge.net/download.html</link>
-            <guid isPermaLink="false">2008-04-22</guid>
-            <pubDate>Tue, 22 Apr 2008 03:22:33 +0400</pubDate>
-        </item>
+    <item>
+      <title>Maxima 5.15.0</title>
+      <link>http://maxima.sourceforge.net/download.html</link>
+      <guid isPermaLink="false">2008-04-22</guid>
+      <pubDate>Tue, 22 Apr 2008 03:22:33 +0400</pubDate>
+    </item>
 
-        <item>
-            <title>Maxima 5.13.0</title>
-            <link>http://maxima.sourceforge.net/download.html</link>
-            <guid isPermaLink="false">2007-09-01</guid>
-            <pubDate>Sat, 01 Sep 2007 00:00:00 +0400</pubDate>
-        </item>
+    <item>
+      <title>Maxima 5.13.0</title>
+      <link>http://maxima.sourceforge.net/download.html</link>
+      <guid isPermaLink="false">2007-09-01</guid>
+      <pubDate>Sat, 01 Sep 2007 00:00:00 +0400</pubDate>
+    </item>
 
-        <item>
-            <title>Maxima 5.12.0</title>
-            <link>http://maxima.sourceforge.net/download.html</link>
-            <guid isPermaLink="false">2007-05-02</guid>
-            <pubDate>Wed, 02 May 2007 00:00:00 +0400</pubDate>
-        </item>
+    <item>
+      <title>Maxima 5.12.0</title>
+      <link>http://maxima.sourceforge.net/download.html</link>
+      <guid isPermaLink="false">2007-05-02</guid>
+      <pubDate>Wed, 02 May 2007 00:00:00 +0400</pubDate>
+    </item>
 
-        <item>
-            <title>Maxima 5.11.0</title>
-            <link>http://maxima.sourceforge.net/download.html</link>
-            <guid isPermaLink="false">2007-01-21</guid>
-            <pubDate>Sun, 21 Jan 2007 00:00:00 +0400</pubDate>
-        </item>
+    <item>
+      <title>Maxima 5.11.0</title>
+      <link>http://maxima.sourceforge.net/download.html</link>
+      <guid isPermaLink="false">2007-01-21</guid>
+      <pubDate>Sun, 21 Jan 2007 00:00:00 +0400</pubDate>
+    </item>
 
-        <item>
-            <title>Maxima 5.10.0</title>
-            <link>http://maxima.sourceforge.net/download.html</link>
-            <guid isPermaLink="false">2006-09-23</guid>
-            <pubDate>Sat, 23 Sep 2006 00:00:00 +0400</pubDate>
-        </item>
+    <item>
+      <title>Maxima 5.10.0</title>
+      <link>http://maxima.sourceforge.net/download.html</link>
+      <guid isPermaLink="false">2006-09-23</guid>
+      <pubDate>Sat, 23 Sep 2006 00:00:00 +0400</pubDate>
+    </item>
 
-        <item>
-            <title>Maxima 5.9.3</title>
-            <link>http://maxima.sourceforge.net/download.html</link>
-            <guid isPermaLink="false">2006-03-21</guid>
-            <pubDate>Tue, 21 Mar 2006 00:00:00 +0400</pubDate>
-        </item>
+    <item>
+      <title>Maxima 5.9.3</title>
+      <link>http://maxima.sourceforge.net/download.html</link>
+      <guid isPermaLink="false">2006-03-21</guid>
+      <pubDate>Tue, 21 Mar 2006 00:00:00 +0400</pubDate>
+    </item>
 
-        <item>
-            <title>Maxima 5.9.1</title>
-            <link>http://maxima.sourceforge.net/download.html</link>
-            <guid isPermaLink="false">2004-09-24</guid>
-            <pubDate>Fri, 24 Sep 2004 00:00:00 +0400</pubDate>
-        </item>
+    <item>
+      <title>Maxima 5.9.1</title>
+      <link>http://maxima.sourceforge.net/download.html</link>
+      <guid isPermaLink="false">2004-09-24</guid>
+      <pubDate>Fri, 24 Sep 2004 00:00:00 +0400</pubDate>
+    </item>
 
-        <item>
-            <title>Maxima 5.9.0</title>
-            <link>http://maxima.sourceforge.net/download.html</link>
-            <guid isPermaLink="false">2003-02-10</guid>
-            <pubDate>Mon, 10 Feb 2003 00:00:00 +0400</pubDate>
-        </item>
+    <item>
+      <title>Maxima 5.9.0</title>
+      <link>http://maxima.sourceforge.net/download.html</link>
+      <guid isPermaLink="false">2003-02-10</guid>
+      <pubDate>Mon, 10 Feb 2003 00:00:00 +0400</pubDate>
+    </item>
 
-    </channel>
+  </channel>
 
 </rss>