the demo actually doesn't work

diff --git a/doc/bugs/graphviz_demo_generates_empty_graph.mdwn b/doc/bugs/graphviz_demo_generates_empty_graph.mdwn
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+The following code in our sandbox generates an empty graph:
+
+    [[!graph  src=""""
+    google [ href="http://google.com/" ]
+    sandbox [ href=\[[SandBox]] ]
+    help [ href=\[[ikiwiki/formatting]] ]
+    newpage [ href=\[[NewPage]] ]
+    
+    google -> sandbox -> help -> newpage -> help -> google;
+    """"]]
+
+It is the exact same thing that on the [[ikiwiki/directive/graph/]] directive documentation, from the [[plugins/graphviz]] plugin. This is ikiwiki 3.20120203 on Debian wheezy and graphviz is installed (2.26.3-10). Note that the first demo actually works. See <http://mesh.openisp.ca/sandbox>  --[[anarcat]]