Rollup merge of rust-lang#53706 - ehuss:rustdoc-section-anchor, r=Gui…

…llaumeGomez

rustdoc: Fix gap on section anchor symbol when hovering.

Fixes rust-lang#49485 for section headings.

src/librustdoc/html/static/rustdoc.css

@@ -558,10 +558,8 @@ a {
 	left: -5px;
 }
 .small-section-header > .anchor {
-	left: -20px;
-}
-.small-section-header > .anchor:not(.field) {
 	left: -28px;
+	padding-right: 10px; /* avoid gap that causes hover to disappear */
 }
 .anchor:before {
 	content: '\2002\00a7\2002';
@@ -758,6 +756,7 @@ a.test-arrow:hover{
 .section-header:hover a:before {
 	position: absolute;
 	left: -25px;
+	padding-right: 10px; /* avoid gap that causes hover to disappear */
 	content: '\2002\00a7\2002';
 }