old_contents: 
  import pytest
  from dune.xt.common.test import load_all_submodule
  
  
  def test_load_all():
      import dune.gdt as gdt
      load_all_submodule(gdt)
  
  
  
new_contents: import pytest
  from dune.xt.common.test import load_all_submodule
  
  
  def test_load_all():
      import dune.gdt as gdt
      load_all_submodule(gdt)
  
subject: apply format