boris/node_modules/applesauce-content/dist/nast/eol-metadata.js

export function eolMetadata() {
    return (tree) => {
        for (let i = 0; i < tree.children.length; i++) {
            const node = tree.children[i];
            const next = tree.children[i + 1];
            if ((node.type === "text" && node.value.endsWith("\n")) ||
                !next ||
                (next.type === "text" && next.value.startsWith("\n"))) {
                node.data = node.data || {};
                node.data.eol = true;
            }
        }
    };
}