diff --git a/src/graphxq/data/samples/cluster.xml b/src/graphxq/data/samples/cluster.xml
index 4fad2ef..9691ec2 100644
--- a/src/graphxq/data/samples/cluster.xml
+++ b/src/graphxq/data/samples/cluster.xml
@@ -1,10 +1,9 @@
-<graph 	xmlns="http://www.martin-loetzsch.de/DOTML" 
-file-name="graphs/bgcolor" rankdir="LR" bgcolor="#80FF80">
-    <node 	id="a"/>
-    <cluster 	id="c1" bgcolor="#FF8080">
-        <node 	id="b"/>
-        <node 	id="c"/>
-        <edge 	from="b" to="c"/>
+<graph xmlns="http://www.martin-loetzsch.de/DOTML" file-name="graphs/bgcolor" rankdir="LR" bgcolor="#80FF80">
+    <node id="a"/>
+    <cluster id="c1" bgcolor="#FF8080">
+        <node id="b"/>
+        <node id="c"/>
+        <edge from="b" to="c"/>
     </cluster>
-    <edge 	from="a" to="b"/>
+    <edge from="a" to="b"/>
 </graph>
\ No newline at end of file