def trailing_blank_lines(physical_line, lines, line_number):
    if physical_line.strip() == '' and line_number == len(lines):
        return 0, "W391 blank line at end of file"
JCR: Trailing blank lines are superfluous.
dataset/ETHPy150Open sahana/eden/static/scripts/tools/pep8.py/trailing_blank_lines