/**
 * Reverses the markdown the theme adds when rendering a type, so the result can
 * be shown as plain code (e.g. inside a code block):
 *
 * - Code spans keep their content verbatim. Code spans are literal markdown, so
 *   the theme never escapes inside them, and their content must not be altered.
 * - Links (`[text](url)`) are reduced to their text.
 * - Backslash escapes are undone (`\\<` to `<`, `\\\\` to `\\`).
 * - Unescaped `*` (bold and italic markers) are removed.
 * - `&lt;` and `&gt;` (from `useHTMLEncodedBrackets`) are decoded.
 *
 * The string is read once from left to right, so content produced by one rule
 * is never rewritten by another.
 */
export declare function unEscapeChars(str: string): string;