rustdoc: include strikethrough in item summary

[lukas-code]

Fixes #111822. Since bold and italic are included, I don't see why strikethrough shouldn't be.

[rustbot]

r? @notriddle

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[notriddle]

@bors r+ rollup

[bors]

📌 Commit f4ce045 has been approved by notriddle

It is now in the queue for this repository.

[bors]

⌛ Testing commit f4ce045 with merge 3869b7b...

[bors]

☀️ Test successful - checks-actions
Approved by: notriddle
Pushing 3869b7b to master...

[rust-timer]

Finished benchmarking commit (3869b7b): comparison URL.

Overall result: no relevant changes - no action needed

@rustbot label: -perf-regression

Instruction count

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

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)	2.3%	[1.3%, 4.1%]	3
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-	-	0

Cycles

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)	2.2%	[2.1%, 2.4%]	2
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-	-	0

Binary size

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

Bootstrap: 643.64s -> 644.637s (0.15%)