I have reverted
../multi_physics/pseudo_elastic_preconditioner.cc
../multi_physics/pseudo_elastic_preconditioner.h
back to the original for testing purposes.
I have taken out build_preconditioner_matrix and used
CRDoubleMatrixHelpers::concatenate_without_communication(..)
It works.
Finished editing/formatting:
block_preconditioner.cc
block_preconditioner.h
double_vector.cc
double_vector.h
linear_algebra_distribution.cc
linear_algebra_distribution.h
matrices.cc
matrices.h
Modified the format of files_to_edit.sh