Fix url in examples.htm

Itemname appears twice

Author: linev

examples.htm

@@ -287,7 +287,7 @@ <h1 id="version"><a href=".." style="color:green">JSROOT</a></h1>
          } else if (entry.asurl) {
             url = ((entry.asurl === "browser") ? "?" : "?nobrowser&");
             url += jsonname ? "json=" + jsonname : "file=" + filename + "&item=" + itemname;
-            url += itemname + "&opt=" + opt;
+            url += "&opt=" + opt;
             if (entry.mathjax) url += "&mathjax";
             if (entry.latex) url += "&latex=" + entry.latex;
             if (entry.style) url += "&style=" + entry.style;