/**
 * - Replace new lines with spaces
 * - Replaces code blocks with single backticks
 * - Replaces multiple spaces with single spaces
 * - Escapes pipes not already escaped, which would otherwise end the cell.
 *   GFM splits rows before parsing code spans, so this applies inside code
 *   spans too; renderers drop the backslash and show a plain `|`.
 */
export declare function formatTableCell(str: string): string;