Use charAt instead of indexOf

Author: Marcel Gerber

src/extensions/default/WebPlatformDocs/InlineDocsViewer.js

@@ -76,12 +76,12 @@ define(function (require, exports, module) {
             var $elem = $(elem);
             var url = $elem.attr("href");
             if (url) {
-                if (url.indexOf("#") === 0) {
+                if (url.charAt(0) === "#") {
                     // Anchors in JSON data are relative to page URL
                     url = templateVars.url + url;
                 } else if (url.substr(0, 4) !== "http") {
                     // URLs in JSON data are relative
-                    url = "http://docs.webplatform.org" + (url.indexOf("/") !== 0 ? "/" : "") + url;
+                    url = "http://docs.webplatform.org" + (url.charAt(0) === "/" ? "/" : "") + url;
                 }
                 $elem.attr("href", url);
             }