Rollup merge of #153023 - rustbot:docs-update, r=ehuss

Update books

## rust-embedded/book

1 commits in fe88fbb68391a465680dd91109f0a151a1676f3e..99d0341ff4e06757490af8fceee790c4ede50bc0
2026-02-11 12:58:13 UTC to 2026-02-11 12:58:13 UTC

- Remove triagebot.toml (rust-embedded/book#405)

## rust-lang/reference

21 commits in addd0602c819b6526b9cc97653b0fadca395528c..442cbef9105662887d5eae2882ca551f3726bf28
2026-02-22 02:55:12 UTC to 2026-02-11 01:41:05 UTC

- Document importing path-segment keyword (rust-lang/reference#2136)
- avoid needless dereference (rust-lang/reference#2180)
- Use `clobber_abi`s corresponding to the called functions in `[asm.abi-clobbers.many]`'s example. (rust-lang/reference#2170)
- expr.paren.evaluation: fix and make more simple (rust-lang/reference#2158)
- const-eval.const-context.outer-generics: make more clear/obvious (rust-lang/reference#2159)
- Nightly test links: update rust branch name (use `main`) (rust-lang/reference#2185)
- tools/xtask: update rust branch name for linkcheck script (use `main`) (rust-lang/reference#2184)
- specify `if let` guards with updated scoping rules (rust-lang/reference#1957)
- Document assignment expression as coercion site (rust-lang/reference#1954)
- Remove exception WRT same-crate `non_exhaustive` reads (rust-lang/reference#2162)
- Add negative lookahead (rust-lang/reference#2172)
- Switch to new range syntax (rust-lang/reference#2173)
- add mdbook output for dev-guide to ignore file (rust-lang/reference#2178)
- Fix rule name for while syntax (rust-lang/reference#2175)
- block-expr: add new rule expr.block.result-value (rust-lang/reference#2174)
- lifetime-elision.md: add some missing periods (rust-lang/reference#2176)
- Add cut operator (`^`) to grammar (rust-lang/reference#2104)
- dev-guide stabilization.md: add missing "not" (rust-lang/reference#2167)
- Add method call and await expr for Dot in syntax index (rust-lang/reference#2163)
- Fix sort of punctuation list (rust-lang/reference#2161)
- Add a contributor guide (rust-lang/reference#2097)

## rust-lang/rust-by-example

1 commits in bac931ef1673af63fb60c3d691633034713cca20..5383db524711c0c9c43c3ca9e5e706089672ed6a
2026-02-16 12:02:33 UTC to 2026-02-16 12:02:33 UTC

- 1.2.2 Display: Fix typo in bonus instructions (before -> after) (rust-lang/rust-by-example#1998)

Author: JonathanBrouwer