Radar · Rust · Archive · Week 51 · Dec 15 – 21, 2025
Change 3872 section headers to 2nd level Markdown
Nice to knowtooling
- What changed
- The Rust team updated RFC 3872 to use Markdown 2nd‑level headings.
- Production impact
- The source does not say.
- Try it
- View the updated RFC to see the new formatting.
- Source
- github.com/rust-lang/rfcs/pull/3896
Understand it, then run it
The change updates RFC 3872 so that its section titles use Markdown level‑two headings (##) instead of level‑one headings (#). RFCs are the documents that describe new language features, so the only thing that changes is how the text is formatted when you view it on GitHub. Nothing in your Rust code is affected; the change only affects the appearance of the RFC document. The change was merged on Dec 15 2025.
Run it now
// This program simply prints a message; the RFC change does not affect Rust code.
// The change is about Markdown formatting in the RFC document, not the language itself.
fn main() {
println!("RFC 3872 now uses level‑two Markdown headings for its sections.");
}
What it printed when we ran it on Rust 1.98.1 (edition 2024)
RFC 3872 now uses level‑two Markdown headings for its sections.
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