Hubbard Hamiltonian test
We now calculate the Hubbard Hamiltonian correctly in the noncollinear case (see !2102 (merged)). This MR adds a test to verify this through finite-difference.
We now calculate the Hubbard Hamiltonian correctly in the noncollinear case (see !2102 (merged)). This MR adds a test to verify this through finite-difference.