WIP: Fix evolution
Description
Fix the routine state_elec_calc_overlap. The symmetrization was simply wrong. This affects only the evolution eigensolver.
News snippet
Fix the routine state_elec_calc_overlap.
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 Nicolas Tancogne-Dejean