tab replace to space 4

[황병희]

Hi, Gilmeh^^^

> We are Python people, aren't we?

Looks good, i did copy it [1], and thanks^^^

[1] https://gitlab.com/soyeomul/test/blob/master/untabify.py

Sincerely,

-- 
^고맙습니다 _地平天成_ 감사합니다_^))//