The Craft Makrdown compare with Github Markdown

Craft has the markdown API named craftBlockToMarkdown, can convert the Craft data to markdown, thus I used it to write my github pages blog, but there are some bug(I think) between the markdown of craft converted and the github markdown.

Here is the render effect of github: The Craft Markdown and The Github Markdown - Xheldon Blog

And the effect in Craft Web Client: The Craft Markdown and The Github Markdown

I Hope there should have an optional that can convert to github markdown syntax, like craftBlockToMarkdown(blocks, 'github', {tableSupported: true}).

Any idea?