Auto merge of #107021 - matthiaskrgr:rollup-0dzxfyi, r=matthiaskrgr

Rollup of 7 pull requests

Successful merges:

 - #106244 (Improve Markdown styling in README)
 - #106747 (Add 'static lifetime suggestion when GAT implied 'static requirement from HRTB)
 - #106873 (dont randomly use `_` to print out const generic arguments)
 - #106992 (Remove unused `#![feature(box_syntax)]` in `alloc`)
 - #106995 (bump failing assembly & codegen tests from LLVM 14 to LLVM 15)
 - #106996 (rustdoc: instead of `.setting-name { width: 100% }`, use default div CSS)
 - #106997 (Add heapsort fallback in `select_nth_unstable`)

Failed merges:

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

src/librustdoc/html/static/css/settings.css

@@ -33,10 +33,6 @@
 	padding-bottom: 1px;
 }
 
-.radio-line .setting-name {
-	width: 100%;
-}
-
 .radio-line .choice {
 	margin-top: 0.1em;
 	margin-bottom: 0.1em;

src/librustdoc/html/static/js/settings.js

@@ -135,7 +135,7 @@
                 // This is a select setting.
                 output += `\
 <div class="radio-line" id="${js_data_name}">
-    <span class="setting-name">${setting_name}</span>
+    <div class="setting-name">${setting_name}</div>
 <div class="choices">`;
                 onEach(setting["options"], option => {
                     const checked = option === setting["default"] ? " checked" : "";