anchor.diff:  module create_model
  -     use NScool_def
  +    use NScool_def
       use constants_def, only: dp
       use constants_lib
       use nucchem_def
  
positive.code:     end subroutine do_setup_crust_zones
      
      subroutine do_setup_crust_composition(s, ierr)
          use, intrinsic :: iso_fortran_env, only: error_unit
          use exceptions_lib
          use nucchem_def
          use nucchem_lib
  
negative.code:     end subroutine do_startup_microphysics
      
      subroutine do_setup_crust_zones(s, ierr)
          use exceptions_lib
          use constants_def
          use nucchem_lib
  