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Radar · Rust · Archive · Week 23 · Jun 1 – 7, 2026

mdBook 0.5.3 update

Nice to knowtooling

What changed
mdBook was updated to version 0.5.3, improving spacing in sidebar section headings and updating cargo dependencies.
Production impact
The source does not say.
Try it
Run mdbook build on a project that uses the latest mdBook to see the spacing changes.
Source
github.com/rust-lang/rfcs/pull/3967

Understand it, then run it

mdBook was bumped from version 0.5.2 to 0.5.3. The update fixes spacing in the sidebar headings of the generated book and updates some Cargo dependencies. No new Rust language feature is involved.

Run it now

Todayrust
// This program demonstrates that the Rust compiler is unchanged by the mdBook update.
// It simply prints a message to confirm that the code compiles and runs.
fn main() {
    println!("mdBook 0.5.3 update has no effect on Rust code.");
}

What it printed when we ran it on Rust 1.98.1 (edition 2024)

mdBook 0.5.3 update has no effect on Rust code.

Run sends this program (for Solidity, the contract and its tests) to our own sandbox, where it is compiled and run once, with no network, and what it printed or the test report comes back here. Nothing is kept. Runs are counted per visitor for the day so everyone gets a turn; the details are on the legal page.

Written by gpt-oss-20b from the linked source · claims checked against the sources · archive, not individually reviewed