感谢 @jiyinyiyong 此前的建议，现已全面支持GFM，同时支持Emoji，Enjoy! :)
2015.05.03 13:15-15:15 期间因此功能升级造成社区服务间歇性中断，抱歉给大家造成不便。

Multiple underscores in words

wow_great_stuff
do_this_and_do_that_and_another_thing.

URL autolinking

http://example.com

Strikethrough

Mistaken text.

Fenced code blocks

Here's an example:

function test() {
  console.log("notice the blank line before this function?");
}

Syntax highlighting

require 'redcarpet'
markdown = Redcarpet.new("Hello World!")
puts markdown.to_html

Tables

Emoji

😛