fix some bugs

public/index.html

@@ -68,9 +68,7 @@
                     return Prism.highlight(code, grammar, lang);
                 }
             })
-            document.getElementById("insert-here").innerHTML = marked.parse(markdowndata, function () {
-                renderSuccess = true;
-            });
+            document.getElementById("insert-here").innerHTML = marked.parse(markdowndata);
             // document.getElementById("toc-entries").innerHTML = toc;
         });
 

public/mdn-style.css

@@ -56,7 +56,7 @@ a {
 
 img,
 picture {
-     display: block; 
+     /* display: block;  */
     max-width: 100%
 }