def test_concatenate_lines():
edf_test = EDF()
test_content = ['#abc\\\n', 'abcd\\ #Comment\n', 'b\\\n', 'aa\n',
'bcd\\\n', 'aa\\\\\n', 'c\n']
output = edf_test._concatenate_lines(test_content)
assert output == ['#abc\\', 'abcd b aa', 'bcd aa\\\\', 'c']
