What is the ruling if a woman declares her waiting period ('Iddah) has ended, and then retracts that declaration?

Primary text

If a woman states her 'Iddah has ended, and then states that it has not ended yet, the husband retains the right of *ruju'* (taking her back). This is because her initial statement was an admission of a falsehood regarding a matter that establishes a right upon her, thus her admission is accepted. The ruling follows the initial period of 'Iddah.