Auto merge of #106301 - notriddle:notriddle/dir-entry, r=GuillaumeGomez

rustdoc: use the regular arrow indicator for dir-entry CSS

This mostly reverts 468acca108e65101b802821bded17149dc1d86c9, while still fixing the problem it fixed by using an internal list-style-position. It results in a slight change in the hover indicator, but nothing misleading.

Preview: http://notriddle.com/notriddle-rustdoc-demos/dir-entry/src/std/lib.rs.html

## Before

![image](https://user-images.githubusercontent.com/1593513/210104247-642e6df0-07d3-452a-a2ab-4c700bc22e0e.png)

## After

![image](https://user-images.githubusercontent.com/1593513/210104271-a3832784-1e4d-4516-983e-6ecb9051857b.png)

1 files changed, 2 insertions, 23 deletions

diff --git a/src/librustdoc/html/static/css/rustdoc.css b/src/librustdoc/html/static/css/rustdoc.css
index b5f1581321e..bc0458bcd28 100644
--- a/src/librustdoc/html/static/css/rustdoc.css
+++ b/src/librustdoc/html/static/css/rustdoc.css
@@ -1387,31 +1387,10 @@ details.dir-entry {
 	padding-left: 4px;
 }
 
-details.dir-entry > summary::after {
-	content: " ►";
-	position: absolute;
-	left: -15px;
-	top: 0px;
-	font-size: 80%;
-	padding: 2px 0px;
-	/* set width to cover gap between arrow and text */
-	width: 25px;
-}
-
-details[open].dir-entry > summary::after {
-	content: " ▼";
-}
-
-details.dir-entry > summary::-webkit-details-marker,
-details.dir-entry > summary::marker {
-	display: none;
-}
-
 details.dir-entry > summary {
-	margin: 0 0 0 13px;
-	list-style: none;
+	margin: 0 0 0 -4px;
+	padding: 0 0 0 4px;
 	cursor: pointer;
-	position: relative;
 }
 
 details.dir-entry div.folders, details.dir-entry div.files {