As you already know, If you have set tab width more than 4, it is block code syntax in markdown. So it's not possible. it is specification - http://daringfireball.net/projects/markdown/syntax#precode

Nevertheless if you want it, you have to change the tab width less than 4.

리포팅 감사드립니다. :-)
해당 문제는 수정되어 다음주중에 v0.13.1 가 릴리즈 될 계획입니다.

Thanks @Fei
It'll be fixed with next release.
I have a plan to release v0.13.1 in a few days.