Nicolas Tancogne-Dejean requested to merge optim_oep_x into develop May 27, 2020

Description

Simple change to avoid unnecessary operations:

\bar{u}_xc is not used for the Slater option
The dot product now does not do the conjugation, instead of conjugating twice the state.

News snippet

Simple change to avoid unnecessary operations.

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.