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

[notriddle]

This mostly reverts 468acca, 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

After

[rustbot]

r? @jsha

(rustbot has picked a reviewer for you, use r? to override)

[rustbot]

Some changes occurred in HTML/CSS/JS.

cc @GuillaumeGomez, @Folyd, @jsha

[GuillaumeGomez]

Then please add a test for the position of the element after the arrow in parent and sub element and in both mobile and desktop.

[notriddle]

@GuillaumeGomez Okay, test case added for the size and styling of the dir-entry summary.

[GuillaumeGomez]

You forgot the position (both x and y) to ensure the parent and its child(ren) have the expected layout (small x and y offset for the child(ren)).

[notriddle]

@GuillaumeGomez Okay, new test assertions added for the x and y positions.

[GuillaumeGomez]

Thanks!

@bors r+ rollup

[bors]

📌 Commit 399fe5d has been approved by GuillaumeGomez

It is now in the queue for this repository.

[bors]

⌛ Testing commit 399fe5d with merge f89003e...

[bors]

☀️ Test successful - checks-actions
Approved by: GuillaumeGomez
Pushing f89003e to master...

[rust-timer]

Finished benchmarking commit (f89003e): comparison URL.

Overall result: ✅ improvements - no action needed

@rustbot label: -perf-regression

Instruction count

This is a highly reliable metric that was used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-0.3%	[-0.3%, -0.3%]	1
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-0.3%	[-0.3%, -0.3%]	1

Max RSS (memory usage)

Results

This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	4.0%	[4.0%, 4.0%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-	-	0

Cycles

This benchmark run did not return any relevant results for this metric.