Link def with [attr] and [attr 2] and [attr 3] and [attr before]

[attr]: http://example.com 'title'
{: hreflang="en" .test}

[attr 2]: http://example.com 'title'
{: hreflang="en"}
{: .test}

[attr 3]: http://example.com
{: .test}
test

{: hreflang="en"}
{: .test}
[attr before]: http://example.com
