Block macro test.

src/docs/asciidoc/jme3/scenegraph_for_dummies.adoc

@@ -10,9 +10,10 @@ ifdef::env-github,env-browser[:outfilesuffix: .adoc]
 
 == jMonkeyEngine3 Scene Graph for Dummies
 
-+++
-<iframe src=https://jmonkeyengine.github.io/wiki/tutorials/scenegraph width="100%" height="850px" alt=""></iframe>
-+++
+iframe::https://jmonkeyengine.github.io/wiki/tutorials/scenegraph[width="100%", height="850px"]
+//+++
+//<iframe src=https://jmonkeyengine.github.io/wiki/tutorials/scenegraph width="100%" height="850px" alt=""></iframe>
+//+++
 //iframe::https://jmonkeyengine.github.io/wiki/tutorials/scenegraph[width="100%", height="850px", alt="", scroll="true",border="true",align="false"]