parsedown/test/data/fenced_code_block.md

```
<?php

$message = 'fenced code block';
echo $message;
```

~~~
tilde
~~~

```php
echo 'language identifier';
```

```c#
echo 'language identifier with non words';
```

```html+php
<?php
echo "Hello World";
?>
<a href="http://auraphp.com" >Aura Project</a>
```

````
the following isn't quite enough to close
```
still a fenced code block
````

```
foo


bar
```