Update books

[rustbot]

rust-embedded/book

2 commits in 2463edeb8003c5743918b3739a9f6870b86396f5..0789b0f29e73ecb91213cac10ad0eec1b9333770
2026-04-11 08:46:22 UTC to 2026-04-10 14:01:38 UTC

• remove IO chapter, is covered in next chapter (remove IO chapter, is covered in next chapter rust-embedded/book#411)
• add embassy chapter (add embassy chapter rust-embedded/book#412)

rust-lang/reference

10 commits in d2715c07e9dd9839c0c7675ecfa18bec539a6ee9..8c88f9d0bdd75ffdc0691676d83212ae22a18cee
2026-04-20 15:20:24 UTC to 2026-04-07 16:25:09 UTC

• typo in example code (typo in example code reference#2232)
• oxford comma (oxford comma reference#2233)
• improve readability (improve readability reference#2234)
• typo (typo reference#2230)
• Clarify items.fn.generics.param-bounds (Clarify items.fn.generics.param-bounds reference#2229)
• follow formatting style guideline (follow formatting style guideline reference#2228)
• Update derive export locations (Update derive export locations reference#2223)
• Clarify that {self} imports require a module parent (Clarify that {self} imports require a module parent reference#2221)
• stabilize s390x vector registers (stabilize s390x vector registers reference#2215)
• Fix misuse of usage throughout the Reference (Fix misuse of *usage* throughout the Reference reference#2222)

rust-lang/rust-by-example

2 commits in b31e3b8da01eeba0460f86a52a55af82709fadf5..898f0ac1479223d332309e0fce88d44b39927d28
2026-04-19 11:40:28 UTC to 2026-04-19 11:38:45 UTC

• remove debug printing for the u32 and bool in variable_bindings.md (remove debug printing for the u32 and bool in variable_bindings.md rust-by-example#1999)
• Update for.md (Update for.md rust-by-example#2008)

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[rustbot]

⚠️ Warning ⚠️

• Some commits in this PR modify submodules.

  If this was not intentional, see I changed a submodule on accident in the rustc dev guide.

• There are issue links (such as #123) in the commit messages of the following commits.
  Please move them to the PR description, to avoid spamming the issues with references to the commit, and so this bot can automatically canonicalize them to avoid issues with subtree.

  • 69dae59

[ehuss]

@bors r+ rollup

[rust-bors]

📌 Commit 69dae59 has been approved by ehuss

It is now in the queue for this repository.