Add example forms for testing

example/page2.html

@@ -1,15 +1,15 @@
 <!doctype html>
 <html>
   <head>
-    <meta charset='utf-8'>
-    <title>Hello</title>
-    <script src='../pjax.js'></script>
-    <script src='example.js'></script>
+    <meta charset="utf-8">
+    <title>Page 2</title>
+    <script src="../pjax.js"></script>
+    <script src="example.js"></script>
   </head>
   <body>
-    <div class='body'>
+    <div class="body">
       <h1>Page 2</h1>
-      Hello. Go to <a href='index.html' class="js-Pjax">Index</a>.
+      Hello. Go to <a href="index.html" class="js-Pjax">Index</a>.
     </div>
   </body>
 </html>