Function diff

packages/jest-matcher-utils/src/index.ts:487–491

(
  a: unknown,
  b: unknown,
  options?: DiffOptions,
)

}

export const diff = (
  a: unknown,
  b: unknown,
  options?: DiffOptions,
): string | null => (shouldPrintDiff(a, b) ? diffDefault(a, b, options) : null);

export const pluralize = (word: string, count: number): string =>
  `${NUMBERS[count] || count} ${word}${count === 1 ? '' : 's'}`;