Rollup merge of rust-lang#96251 - ehuss:update-books, r=ehuss

Update books

## book

3 commits in 765318b844569a642ceef7bf1adab9639cbf6af3..de0dbffc5812fd885700874e8d258dd334733ac4
2022-04-12 21:14:47 -0400 to 2022-04-18 19:29:45 -0400
- Remove duplicate text
- Add missing punctuation mark in ch16-01
- Update main.rs

## rust-by-example

1 commits in c2a98d9fc5d29c481d42052fbeccfde15ed03116..44a80e8d8bfc5881c9bd69a2cb3a570776ee4181
2022-04-08 06:44:18 -0300 to 2022-04-19 07:46:28 -0300
- Use rust 2018 module file hierarchy (rust-lang/rust-by-example#1532)

## rustc-dev-guide

6 commits in eeb5a83..043e60f
2022-04-11 23:29:48 +0900 to 2022-04-20 18:57:49 +0900
- Fix a small typo (rust-lang/rustc-dev-guide#1343)
- Extend debugging llvm section (rust-lang/rustc-dev-guide#1290)
- Send people doing *library* stabilizations over to the std-dev-guide (rust-lang/rustc-dev-guide#1317)
- Fix typo serious->series (rust-lang/rustc-dev-guide#1336)
- Minor type fix (rust-lang/rustc-dev-guide#1337)
- sessiondiagnostic: translation (rust-lang/rustc-dev-guide#1333)

## embedded-book

3 commits in a6de8b6e3ea5d4f0de8b7b9a7e5c1405dc2c2ddb..f7cefbb995eec8c6148f213235e9e2e03268e775
2022-03-17 21:21:39 +0000 to 2022-04-20 10:38:51 +0000
- Fix use of unaligned references in example  (rust-embedded/book#317)
- Correct C interop declarations  (rust-embedded/book#315)
- Update index.md  (rust-embedded/book#316)