Sample code block from testing syntax highlighting:
# hello world
you can write text [with links](http://example.com) inline or [link references][1].
* one _thing_ has *em*phasis
* two __things__ are **bold**
[1]: http://example.com
---
hello world
===========
<this_is inline="xml"></this_is>
> markdown is so cool
so are code segments
1. one thing (yeah!)
2. two thing `i can write code`, and `more` wipee!