Improvement for oct-conductivity

Nicolas Tancogne-Dejeanrequested to merge
improved_oct_conductivity into develop

Description

Fix a minor bug for transient absorption and remove the constant current when there is no smearing (i.e. for non-metalic systems).

Checklist

  • I have checked that my code follows the Octopus coding standards
  • I have added tests for all the new features added in this request.

Merge request reports