Rollup of 15 pull requests

[Centril]

Successful merges:

• Consider references and unions potentially inhabited during privacy-respecting inhabitedness checks #56110 (Consider references and unions potentially inhabited during privacy-respecting inhabitedness checks)
• Use a SmallVec within _match::Matrix. #56269 (Use a SmallVec within _match::Matrix.)
• update miri #56305 (update miri)
• Enable -mergefunc-use-aliases #56358 (Enable -mergefunc-use-aliases)
• Stabilize self_in_typedefs feature #56366 (Stabilize self_in_typedefs feature)
• Refer to the second borrow as the "second borrow" in E0501.rs #56372 (Refer to the second borrow as the "second borrow" in E0501.rs)
• Deal with EINTR in net timeout tests #56394 (Deal with EINTR in net timeout tests)
• Stabilize dbg!(...) #56395 (Stabilize dbg!(...))
• Move VecDeque::resize_with out of the impl<T:Clone> block #56401 (Move VecDeque::resize_with out of the impl<T:Clone> block)
• Improve the unstable book example for #[marker] trait #56402 (Improve the unstable book example for #[marker] trait)
• Update tracking issue for extern_crate_self #56412 (Update tracking issue for extern_crate_self)
• Remove unneeded body class selector #56416 (Remove unneeded body class selector)
• Fix failing tidy (line endings on Windows) #56418 (Fix failing tidy (line endings on Windows))
• Remove some uses of try! #56419 (Remove some uses of try!)
• Mention raw-ident syntax #56424 (Mention raw-ident syntax)

Failed merges:

r? @ghost

[Centril]

@bors r+ p=10

[bors]

📌 Commit 49089f858b15d56bf20bb85012b74a6a538086c6 has been approved by Centril