| ## A plain header | |
| Let's first have a plain header | |
| An underlined header | |
| ==================== | |
| (That's also useful) | |
| # A header with a [link](http://www.link.com) | |
| First with a hash | |
| Another with a [link][a] | |
| ------------------------ | |
| This time underlined | |
| [a]: http://www.link.com/ |