Check file equality by line

tests/test_io.py

@@ -17,8 +17,8 @@ def compare_text_files(file_path_1, file_path_2):
     """Check whether two text files have identical contents, ignoring different 
     newline characters."""
     with open(file_path_1, "r") as file1, open(file_path_2, "r") as file2:
-        file1_contents, file2_contents = file1.read(), file2.read()
-        return file1_contents == file2_contents
+        file1_contents, file2_contents = file1.readlines(), file2.readlines()
+        assert file1_contents == file2_contents
 
 
 EXPORT_FUNCS_BY_FILE_TYPE = {
@@ -86,11 +86,7 @@ def test_regression(file_type, export_func, shape_name):
         test_file_path = Path(tempdir) / f"test_{shape_name}.{file_type}"
         export_func(shape=shape, filename=test_file_path)
 
-        assert compare_text_files(control_file_path, test_file_path), (
-            f"During regression testing with the shape '{shape_name}' and "
-            f"file type '{file_type}', {control_file_path.name} and "
-            f"{test_file_path.name} were found to be not equivalent."
-        )
+        compare_text_files(control_file_path, test_file_path)
 
 
 if __name__ == "__main__":