def pc_str_width(cls):
        width = 3   # "100"
        if cls._precision > 0:
            width += 1 + cls._precision
        return width
How many characters wide can pc_covered_str be?
dataset/ETHPy150Open RoseOu/flasky/venv/lib/python2.7/site-packages/coverage/results.py/Numbers.pc_str_width