anchor.diff:  
     end subroutine
   
  +  !---------------------------------------------------------------------------!
  +
     subroutine mincf_get_or_error(cfg,key,buf,errno)
   
       interface
         subroutine c_mincf_get(cfg,key,key_sz,buf,sz,errno) &
  -        & bind(C,name='fort_mincf_get')
  +            & bind(C, name='fort_mincf_get')
           use iso_c_binding
           import config
           type(config), intent(out) :: cfg
  
positive.code: 
    interface
      subroutine mincf_free(cfg) &
        & bind(C,name='mincf_free')
        use iso_c_binding
        import :: config
        type(config), intent(inout) :: cfg
  
negative.code: 
    end subroutine
  
    !---------------------------------------------------------------------------!
  
    logical function mincf_exists(cfg,key)
      type(config), intent(out) :: cfg
      character(len=*), intent(in) :: key
      integer :: errno
  
      interface
        subroutine c_mincf_get_exists(cfg,key,key_sz,errno) &
              & bind(C, name='fort_mincf_get_exists')
          use iso_c_binding
          import config
          type(config), intent(out) :: cfg
  