Fixed wrong usage of data-next-slide-indexh in demo (was `[data-nex…

…t-slide-idx]`)

webyarns-demo.html

@@ -42,8 +42,8 @@ <h1>Next slide is right only</h1>
 		<section>
 			<h1>Previous was right only</h1>
 		</section>
-		<section data-next-slide-idx="1">
-			<h2>This one has a <code>data-next-slide-idx=1</code></h2>
+		<section data-next-slide-indexh="1">
+			<h2>This one has a <code>data-next-slide-indexh=1</code></h2>
 		</section>
 		<section data-auto-move-to="1" data-auto-move-time-sec="5">
 			<h2>Slide will move automatically move</h2>
@@ -69,6 +69,7 @@ <h1>End</h1>
 			// - https://github.com/hakimel/reveal.js#configuration
 			// - https://github.com/hakimel/reveal.js#dependencies
 			Reveal.initialize({
+
 				dependencies: [
 					{ src: 'webyarns/lib/webyarn-plugin.js' },
 					{ src: 'plugin/markdown/marked.js' },