Rollup merge of #156810 - Teufelchen1:fix_doc_typo, r=SimonSapin

Fix doc typo in Vec::into_array and convert Arc/Box/Rc::into_arry to -> Result

Hello 🪼,

the first commit fixes a documentation mistake added in the recent PR rust-lang/rust#156234

The second commit addresses three function signature changes as defined by the tracking issue rust-lang/rust#148082
It converts all `.into_array() -> Option<>` into `.into_array() -> Result<>`

The third commit is a fixup for the second. The change is needed as calling `unwrap()` on `Err(E)` requires `E` to implement `Debug`. I thought `Vec<T, A> where T: Debug` is not an acceptable solution, so I tried to come up with my own. I am *NOT* confident in my `unsafe {}`  code due to lack of expierence, please check extra carefully.

Appreciating feedback & greetings from the RustWeek,
Thanks!
tree: bdc61a4e1a67a78d7e8f61222142c37708aa8126
  1. .github/
  2. compiler/
  3. library/
  4. LICENSES/
  5. src/
  6. tests/
  7. .clang-format
  8. .editorconfig
  9. .git-blame-ignore-revs
  10. .gitattributes
  11. .gitignore
  12. .gitmodules
  13. .ignore
  14. .mailmap
  15. bootstrap.example.toml
  16. Cargo.lock
  17. Cargo.toml
  18. CODE_OF_CONDUCT.md
  19. configure
  20. CONTRIBUTING.md
  21. COPYRIGHT
  22. INSTALL.md
  23. LICENSE-APACHE
  24. license-metadata.json
  25. LICENSE-MIT
  26. package.json
  27. README.md
  28. RELEASES.md
  29. REUSE.toml
  30. rust-bors.toml
  31. rustfmt.toml
  32. triagebot.toml
  33. typos.toml
  34. x
  35. x.ps1
  36. x.py
  37. yarn.lock
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