I mean writing questions/answers in Mathematica notebook, and converting it to string/file which can be copied and pasted here with good appearance.
I've tried a little.
four spaces ,
* *, such MarkDown is easy to achieve.
Are you interested in the
Writing in Mathematica notebook and Converting that to websites:blogs and here
And is there any functions, templates, or packages, or old posts/questions/discussions/answers about this topic?