/**
 * Minimal line-diff implementation for lerna init dry-run output.
 *
 * Replaces jest-diff to eliminate the runtime dependency on jest packages and
 * their transitive dependencies (pretty-format, chalk, ansi-styles).
 *
 * Modeled on the equivalent replacement in Nx:
 * https://github.com/nrwl/nx/blob/master/packages/nx/src/command-line/release/utils/diff.ts
 * The hunk formatting is a faithful port of jest-diff's joinAlignedDiffsNoExpand,
 * but the line alignment uses a classic LCS table instead of @jest/diff-sequences,
 * which is more than fast enough for the small config files lerna init touches.
 */
export interface DiffOptions {
    contextLines?: number;
    expand?: boolean;
    aColor?: (s: string) => string;
    bColor?: (s: string) => string;
    commonColor?: (s: string) => string;
    patchColor?: (s: string) => string;
    omitAnnotationLines?: boolean;
}
export declare function diff(a: string, b: string, options?: DiffOptions): string;