Suggest link reference on links

Hi, I'm proposing this enhancement in the plugin. In markdown one can write this :

This is a [Asciidoctor][1].

[1]: http://asciidoctor.org/ "Asciidocotor"

Which is rendered as this

This is a Asciidoctor.

While there's no exact replacement, the document attributes can serve the same purpose, and it is advise by mojavelinux himself ;)

So imagine the following asciidoc

This is a http://asciidoctor.org/[Asciidoctor].

The plugin could suggest, to variabilise the link into a document attribute, maybe propose both of the following forms :

:link-asciidoctor: http://asciidoctor.org/

This is a {link-asciidoctor}[Asciidoctor]

:link-asciidoctor: http://asciidoctor.org/[Asciidoctor]

This is a {link-asciidoctor}

Source :

• https://asciidoctor.org/docs/user-manual/#content-reuse
• https://github.com/asciidoctor/asciidoctor/issues/2581