I have a nested list like the following:
L:((2020.07.01 2020.09.30);
(2020.10.01 2020.12.31);
(2021.01.01 2021.03.31);
(2021.04.01 2021.06.30);
(2021.07.01 2021.09.30);
(2021.10.01 2021.12.31);
(2022.01.01 2022.03.31);
(2022.04.01 2022.06.30))
and I want to simply reassign the last unit (L[7][1]), to a new date. I tried
L[7][1]:2022.05.31
but got an 'assign error. How do I reassign an element in a nested list?