Allow `#![doc(test(attr(..)))]` everywhere
This PR adds the ability to specify [`#![doc(test(attr(..)))]`](https://doc.rust-lang.org/nightly/rustdoc/write-documentation/the-doc-attribute.html#testattr) ~~at module level~~ everywhere in addition to allowing it at crate-root.
This is motivated by a recent PR #140323 (by ````@tgross35)```` where we have to duplicate 2 attributes to every single `f16` and `f128` doctests, by allowing `#![doc(test(attr(..)))]` at module level (and everywhere else) we can omit them entirely and just have (in both module):
```rust
#![doc(test(attr(feature(cfg_target_has_reliable_f16_f128))))]
#![doc(test(attr(expect(internal_features))))]
```
Those new attributes are appended to the one found at crate-root or at a previous module. Those "global" attributes are compatible with merged doctests (they already were before).
Given the small addition that this is, I'm proposing to insta-stabilize it, but I can feature-gate it if preferred.
Best reviewed commit by commit.
r? ````@GuillaumeGomez````
Update books
## rust-lang/book
4 commits in 230c68bc1e08f5f3228384a28cc228c81dfbd10d..634724ea85ebb08a542970bf8871ac8b0f77fd15
2025-05-29 13:16:14 UTC to 2025-05-22 21:35:03 UTC
- Chapter 10 from tech review (rust-lang/book#4379)
- Chapter 9 from tech review (rust-lang/book#4377)
- Chapter 8 from tech review (rust-lang/book#4378)
- Chapter 7 from tech review (rust-lang/book#4374)
## rust-embedded/book
3 commits in 0b8219ac23a3e09464e4e0166c768cf1c4bba0d5..10fa1e084365f23f24ad0000df541923385b73b6
2025-05-27 18:37:30 UTC to 2025-05-27 18:26:36 UTC
- portability: add reference to embedded-hal docs (rust-embedded/book#391)
- remove the unused and deprecated `multilingual` field from `book.toml` (rust-embedded/book#388)
- Ci upgrade 20250522 (rust-embedded/book#393)
## rust-lang/nomicon
4 commits in c76a20f0d987145dcedf05c5c073ce8d91f2e82a..8b61acfaea822e9ac926190bc8f15791c33336e8
2025-05-26 10:16:09 UTC to 2025-05-23 15:03:00 UTC
- Use inline const expression in unchecked-uninit.md (rust-lang/nomicon#492)
- Fix code sample output in unchecked-uninit.md (rust-lang/nomicon#491)
- Use consistent type parameters in subtyping.md (rust-lang/nomicon#493)
- Fix typo in atomics.md (rust-lang/nomicon#494)
## rust-lang/reference
1 commits in 118fd1f1f0854f50e3ae1fe4b64862aad23009ca..8e0f593a30f3b56ddb0908fb7ab9249974e08738
2025-05-31 20:12:39 UTC to 2025-05-31 20:12:39 UTC
- Minor fixes to `$crate` behavior (rust-lang/reference#1816)
## rust-lang/rust-by-example
4 commits in c9d151f9147c4808c77f0375ba3fa5d54443cb9e..21f4e32b8b40d36453fae16ec07ad4b857c445b6
2025-05-29 12:45:08 UTC to 2025-05-29 12:44:23 UTC
- Update book.toml rename `author` field to `authors` (rust-lang/rust-by-example#1917)
- Add example to comment.md to teach how to toggle a whole code block using block comments (rust-lang/rust-by-example#1919)
- The example is not meant to be compiled with out passing arguments. (rust-lang/rust-by-example#1930)
- added a shorthand for the #[should_panic(expected = "msg") (rust-lang/rust-by-example#1931)
Improve documentation for codegen options
This adds more information to many different codegen options. It should not add any new guarantees, just document existing behavior.
r? bjorn3
Optionally don't steal the THIR
The THIR being stolen is a recurrent pain for authors of rustc drivers. This makes it optional, so that the `thir_body` query can still be used after analysis of the crate has completed.
