Auto merge of #90598 - JohnTitor:rollup-kz1qioz, r=JohnTitor

Rollup of 9 pull requests

Successful merges:

 - #90507 (Suggest `extern crate alloc` when using undeclared module `alloc`)
 - #90530 (Simplify js tester a bit)
 - #90533 (Add note about x86 instruction prefixes in asm! to unstable book)
 - #90537 (Update aarch64 `target_feature` list for LLVM 12.)
 - #90544 (Demote metadata load warning to "info".)
 - #90554 (Clean up some `-Z unstable-options` in tests.)
 - #90556 (Add more text and examples to `carrying_{add|mul}`)
 - #90563 (rustbot allow labels)
 - #90571 (Fix missing bottom border for headings in sidebar)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup

2 files changed, 9 insertions, 3 deletions

diff --git a/src/librustdoc/html/static/css/rustdoc.css b/src/librustdoc/html/static/css/rustdoc.css
index 93cbc0debb9..89a763ef6d7 100644
--- a/src/librustdoc/html/static/css/rustdoc.css
+++ b/src/librustdoc/html/static/css/rustdoc.css
@@ -156,7 +156,8 @@ h1.fqn > .in-band > a:hover {
 	section hierarchies. */
 h2,
 .top-doc h3,
-.top-doc h4 {
+.top-doc h4,
+.sidebar .others h3 {
 	border-bottom: 1px solid;
 }
 h3.code-header {
diff --git a/src/librustdoc/html/static/js/main.js b/src/librustdoc/html/static/js/main.js
index c421c6e9dc1..4b55a0a69b6 100644
--- a/src/librustdoc/html/static/js/main.js
+++ b/src/librustdoc/html/static/js/main.js
@@ -566,6 +566,7 @@ function hideThemeButtonState() {
     // delayed sidebar rendering.
     window.initSidebarItems = function(items) {
         var sidebar = document.getElementsByClassName("sidebar-elems")[0];
+        var others;
         var current = window.sidebarCurrent;
 
         function addSidebarCrates(crates) {
@@ -594,7 +595,7 @@ function hideThemeButtonState() {
                 li.appendChild(link);
                 ul.appendChild(li);
             }
-            sidebar.appendChild(div);
+            others.appendChild(div);
         }
 
         function block(shortty, longty) {
@@ -635,10 +636,14 @@ function hideThemeButtonState() {
                 ul.appendChild(li);
             }
             div.appendChild(ul);
-            sidebar.appendChild(div);
+            others.appendChild(div);
         }
 
         if (sidebar) {
+            others = document.createElement("div");
+            others.className = "others";
+            sidebar.appendChild(others);
+
             var isModule = hasClass(document.body, "mod");
             if (!isModule) {
                 block("primitive", "Primitive Types");