Rollup of 14 pull requests

[Centril]

Successful merges:

• Fix for issue #58050 #58075 (Fix for issue Mention 2015 edition in "note: ? is not a macro repetition operator" errors #58050)
• rustdoc: move collapse and unindent docs passes earlier #58627 (rustdoc: move collapse and unindent docs passes earlier)
• Make visit_clobber panic-safe. #58630 (Make visit_clobber panic-safe.)
• Deny async fn in 2015 edition #58678 (Deny async fn in 2015 edition)
• Fix an indexing error when using x.py help #58680 (Fix an indexing error when using x.py help)
• Fix copy-pasted typo for read_string return value #58703 (Fix copy-pasted typo for read_string return value)
• Update dlmalloc to 0.1.3 #58744 (Update dlmalloc to 0.1.3)
• std: docs: Disable running several Stdio doctests #58746 (std: docs: Disable running several Stdio doctests)
• update scoped_tls to 1.0 #58748 (update scoped_tls to 1.0)
• Reduce Repetitions of (n << amt) >> amt #58749 (Reduce Repetitions of (n << amt) >> amt)
• Update string_cache_codegen to 0.4.2 #58752 (Update string_cache_codegen to 0.4.2)
• Clarify rotate_{left,right} docs #58755 (Clarify rotate_{left,right} docs)
• Normalize the type Self resolves to in an impl #58757 (Normalize the type Self resolves to in an impl)
• Add tracking issue for the unwind attribute #58761 (Add tracking issue for the unwind attribute)

Failed merges:

r? @ghost