Code
# This is an \<h1\> tag
## This is an \<h2\> tag
###### This is an \<h6\> tag
*This text will be italic*
_This will also be italic_
**This text will be bold**
__This will also be bold__
_You **can** combine them_
* Item 1
* Item 2
  * Item 2a
  * Item 2b
1. Item 1
2. Item 2
3. Item 3
  1. Item 3a
  2. Item 3b

http://github.com (automatic link conversion)
[GitHub](http://github.com) (link with text)
Block quotes - as Kanye West said:
> We're living the future so
> the present is our past.
I think you should use an `<addr>` element here instead.
``` javascript
function fancyAlert(arg) {
  if(arg) {
    $.facebox({div:'#foo'})
  }
}
```
- [x] @mentions, #refs, [links](), **formatting**, and <del>tags</del> supported
- [x] list syntax required (any unordered or ordered list supported)
- [x] this is a complete item
- [ ] this is an incomplete item
First Header | Second Header
------------ | -------------
Content from cell 1 | Content from cell 2
Content in the first column | Content in the second column
~~this~~
@octocat :+1: This PR looks great - it's ready to merge! :shipit:
Following are the results redered from above formats
Results
This is an \<h1> tag¶
This is an \<h2> tag¶
This is an \<h6> tag¶
This text will be italic
This will also be italic
This text will be bold
This will also be bold
You can combine them
- Item 1
- Item 2
- Item 2a
-  Item 2b 
-  Item 1 
- Item 2
- Item 3
- Item 3a
- Item 3b

http://github.com (automatic link conversion)
GitHub (link with text)
Block quotes - as Kanye West said:
We're living the future so the present is our past.
I think you should use an <addr> element here instead.
function fancyAlert(arg) {
  if(arg) {
    $.facebox({div:'#foo'})
  }
}
- [x] @mentions, #refs, links, formatting, and tagssupported
- [x] list syntax required (any unordered or ordered list supported)
- [x] this is a complete item
- [ ] this is an incomplete item
| First Header | Second Header | 
|---|---|
| Content from cell 1 | Content from cell 2 | 
| Content in the first column | Content in the second column | 
~~this~~
@octocat  This PR looks great - it's ready to merge! :shipit: