Add needed trim to default_model_mod.f90

Co-authored-by: Helen Kershaw <20047007+hkershaw-brown@users.noreply.github.com>

models/utilities/default_model_mod.f90

@@ -344,7 +344,7 @@ function parse_variables_clamp(vars_table) result(state_vars)
    ! Make sure DART qty is valid
    state_vars%qtys(i) = get_index_for_quantity(dart_qty_str)
    if( state_vars%qtys(i) < 0 ) then
-      write(string1,*) 'The quantity specified in the &model_nml "', dart_qty_str, '", is not present in obs_kind_mod.f90'
+      write(string1,*) 'The quantity specified in the &model_nml "', trim(dart_qty_str), '", is not present in obs_kind_mod.f90'
       call error_handler(E_ERR,'get_state_variables_clamp',string1)
    endif