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QR code for a link

A link as a QR code of version 5, drawn as a small, deterministic SVG: one unit per module, a quiet zone of four modules and the title as the accessible name. chartlet::qr is a Rust API, not a chart type — there is no specification and no command-line option for it.

use chartlet::qr::{ErrorCorrection, QrCode};

let code = QrCode::encode("https://casoon.github.io/chartlet/", ErrorCorrection::Medium)?;
let svg = code.to_svg("Link to the chartlet documentation", 4);