Rollup merge of #24790 - jooert:fix24774, r=steveklabnik

Fixes #24774.

r? @steveklabnik

src/rustbook/javascript.rs

@@ -52,7 +52,7 @@ document.addEventListener("DOMContentLoaded", function(event) {
   }
 
   for (var i = 0; i < toc.length; i++) {
-    if (toc[i].attributes['href'].value === href) {
+    if (toc[i].attributes['href'].value.split('/').pop() === href) {
       var nav = document.createElement('p');
       if (i > 0) {
         var prevNode = toc[i-1].cloneNode(true);