old_contents: import helpers
  import pytest
  
  import meshio
  
  test_set = [
      helpers.empty_mesh,
      helpers.line_mesh,
      helpers.tri_mesh_2d,
      helpers.tri_mesh,
      helpers.triangle6_mesh,
      helpers.quad_mesh,
      helpers.quad8_mesh,
      helpers.tri_quad_mesh,
      helpers.tet_mesh,
      helpers.tet10_mesh,
      helpers.hex_mesh,
      helpers.hex20_mesh,
      helpers.pyramid_mesh,
      helpers.wedge_mesh,
  ]
  
  
  @pytest.mark.parametrize("mesh", test_set)
  def test(mesh):
      helpers.write_read(meshio.netgen.write, meshio.netgen.read, mesh, 1.0e-13, extension=".vol")
      helpers.write_read(meshio.netgen.write, meshio.netgen.read, mesh, 1.0e-13, extension=".vol.gz")
  
new_contents: import helpers
  import pytest
  
  import meshio
  
  test_set = [
      helpers.empty_mesh,
      helpers.line_mesh,
      helpers.tri_mesh_2d,
      helpers.tri_mesh,
      helpers.triangle6_mesh,
      helpers.quad_mesh,
      helpers.quad8_mesh,
      helpers.tri_quad_mesh,
      helpers.tet_mesh,
      helpers.tet10_mesh,
      helpers.hex_mesh,
      helpers.hex20_mesh,
      helpers.pyramid_mesh,
      helpers.wedge_mesh,
  ]
  
  
  @pytest.mark.parametrize("mesh", test_set)
  def test(mesh):
      helpers.write_read(
          meshio.netgen.write, meshio.netgen.read, mesh, 1.0e-13, extension=".vol"
      )
      helpers.write_read(
          meshio.netgen.write, meshio.netgen.read, mesh, 1.0e-13, extension=".vol.gz"
      )
  
subject: fix lint errors