/**
 * Shared escaping for the XML documents this layer emits. `sitemap.xml` and the
 * changelog's Atom feed both interpolate site-supplied strings into markup, and
 * both need the same five characters escaped, so the rule lives here rather than
 * once per generator.
 */
/**
 * Escape a string for use as XML text or as an attribute value. All five
 * predefined entities are escaped, rather than the subset each position strictly
 * needs, so a caller can never pick the wrong one.
 */
export declare function escapeXml(s: string): string;