ensure DataExchange can deal with non ascci filenames

Author: tpaviot

src/Extend/DataExchange.py

@@ -446,7 +446,11 @@ def write_iges_file(a_shape, filename):
  read_stl_file("s_stl_precise_ascii.stl")
  # iges test
  write_iges_file(sphere_shape, "s_iges.igs")
+ # write IGES with special character
+ write_iges_file(sphere_shape, "sphère.igs")
+ read_iges_file("sphère.igs")
  read_iges_file("s_iges.igs")
  read_iges_file("s_iges.igs", return_as_shapes=True)
  # test step with colors
  read_step_file_with_names_colors("s_214.stp")
+