Dealing with imaginary eigenvalues

[tumble-weed]

Hello,
As i understand , this line deals with imaginary eigenvalues, and creates real eigenvectors in M. according to the torch documentation for eig, the suggestion is to perform linear combinations of the ith and i+1th initial eigenvectors to get the real eigenvectors. however in the code there seems to just be a reassignment, which will still leave M[:,i] complex if it was originally so ( because then M[:,i+1] would have been complex as well)
can you please verify this line is correct?