1In the following example we will im[ple]ment support for [fenced code blocks][] which are part
2of the [github flavored markdown][gfm].
3
4[fenced code blocks]: https://help.github.com/articles/github-flavored-markdown#fenced-code-blocks
5                      "Fenced code block feature of github flavored markdown"
6[gfm]: https://github.com
7[unused]: https://github.com/unused
8
9hey, check [this].
10
11[this]: https://github.com/cebe/markdown
12
13ref on end of line [this]
14next line.
15
16this is a [multi
17line] reference.
18
19this is a [Link
20with][multi
21line] reference.
22
23[multi line]: http://example.com
24
25[ ]
26
27[not a] reference