Fix xcrysden output
Description
Fix the xcrysden output for non-orthogonal cells, due to a wrong transpose. Results was ok for fcc and bcc cells, as the lattice vector matrix is equal to its transpose. Octopus still verify rule 1 of DFT codes: everything works for Si.
News snippet
Fix the xcrysden output for non-orthogonal cells
Checklist
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I have checked that my code follows the Octopus coding standards - [] I have added tests for all the new features added in this request.
Edited by Micael Oliveira