Undo block macro test.

build.gradle

@@ -35,15 +35,15 @@ asciidoctor {
 		'orgname':'jMonkeyEngine'
 	options header_footer: true,
 		template_dirs: [file('src/templates/slim').absolutePath]
-
+/*
 	extensions {
 		block_macro(name: 'iframe') {
 			parent, target, attributes ->
-			String content = +++<iframe src="${target}"></iframe>+++;
+			String content = """<iframe src="${target}"></iframe>""";
 			createBlock(parent, "pass", [content], attributes, config);
 		}
 	}
-
+*/
 }
 
 asciidoctor.doLast {