https://github.com/FormalizedFormalLogic/Foundation/blob/c28942b7d9d0df41ee5b736602c3f27b8643532c/Foundation/Modal/Formula/Basic.lean#L31 なぜか `verum` と `top` を2つ定義していた.
https://github.com/FormalizedFormalLogic/Foundation/blob/c28942b7d9d0df41ee5b736602c3f27b8643532c/Foundation/Modal/Formula/Basic.lean#L31
なぜか
verumとtopを2つ定義していた.