Rollup merge of rust-lang#92546 - ehuss:update-books, r=ehuss

Update books

## reference

3 commits in 06f9e61931bcf58b91dfe6c924057e42ce273ee1..f8ba2f12df60ee19b96de24ae5b73af3de8a446b
2021-12-17 07:31:40 -0800 to 2022-01-03 11:02:08 -0800
- Switch the default edition for examples to 2021 (rust-lang/reference#1125)
- Clarify behavior of x87 FP registers in inline assembly (rust-lang/reference#1126)
- Add inline assembly to the reference (rust-lang/reference#1105)

## book

36 commits in 8a0bb3c96e71927b80fa2286d7a5a5f2547c6aa4..d3740fb7aad0ea4a80ae20f64dee3a8cfc0c5c3c
2021-12-22 20:54:27 -0500 to 2022-01-03 21:46:04 -0500
- Add a concrete example of an optional value. Fixes rust-lang/book#2848.
- match isn't really an operator. Fixes rust-lang/book#2859
- Edits to edits of chapter 6
- Make fixes recommended by shellcheck
- Use shellcheck
- SIGH fix all the typos that were missed while spellcheck was broken
- SIGH add all the words to the dictionary that were missed while spellcheck was broken
- Remove test_harness from the dictionary
- sigh, the xkcd sandwich one
- Install aspell in CI
- set -eu in all bash scripts
- typo: assignement -> assignment
- Fix quotes
- Snapshot of ch12 for nostarch
- Use 'static lifetime earlier because that's more correct. Fixes rust-lang/book#2864.
- Add does_not_compile annotation to intermediate steps that don't compile
- Sidestep who provides output streams. Fixes rust-lang/book#2933.
- Remove note about primitive obsession. Fixes rust-lang/book#2863.
- Remove sentence encouraging writing tests on your own. Fixes rust-lang/book#2223.
- Bump mdBook version to 0.4.14 in workflow main.yml
- Past tense make better sense
- Past tense makes better sense
- Update the edition in all the listings' Cargo.toml
- Update the book to either say 2021 edition or not talk about editions
- Remove most of the 2018 edition text from the title page. Fixes rust-lang/book#2852.
- Fix word wrapping
- Emphasize return type is mandatory
- fix title capitalization
- Further edits to mention of --include-ignored, propagate to src
- feat: mention `cargo test -- --include-ignored`
- wording: get rid of "to from"
- interchanged position of `binary` and `library`
- Fix wrong word typo
- Further edits in rust-analyzer text
- appendix-04 IDE integration: Replaced rls by rust-analyzer
- Update link to Italian translation. Connects to rust-lang/book#2484.

## rustc-dev-guide

3 commits in 9bf0028..8754644
2021-12-20 21:53:57 +0900 to 2021-12-28 22:17:49 -0600
- Update link to moved section (rust-lang/rustc-dev-guide#1282)
- Fix link in contributing.md (rust-lang/rustc-dev-guide#1280)
- Streamline "Getting Started" (rust-lang/rustc-dev-guide#1279)

Author: matthiaskrgr