Render crashes when applying tabsize attribute to a tab-formatted text

[SureSRM]

Render crashes when applying tabsize attribute to a tab-formatted text

When you have a tab-formatted text and you want to overwrite the default 8 spaces per tab there are two ways to do it:

• Whole text atribute: By setting :tabsize: 4
• Per block atribute: By setting [tabsize=4]

The issue is that when any of these methods are applied, te render crashes and shows a

• Atom version: 1.24.0
• OS: KDE Neon 5.12
• asciidoc-preview version: 2.10.4
• language-asciidoc version: 1.11.0

Screenshots

Steps to reproduce

Try to preview this file: ./test.adoc

= Title
:tabsize: 4

----
{
	"tabbed": {
	}
}
----

Important note

This same file works well with other Asciidoc libs like the bundled in asciidoctor/docker-asciidoctor so you can try yourself by just typing:

docker run --rm -v $(pwd):/documents/ asciidoctor/docker-asciidoctor asciidoctor index.txt

[ggrossetie]

Most likely related to https://github.com/asciidoctor/asciidoctor.js/issues/173