Updated AsciiDoc syntax submodule

[rxt1077]

I've updated the AsciiDoc syntax to a newer version (from the AsciiDoctor project) which happens to work with fancy-regex. My problem originally was that nushell was crashing when I tried to open adoc files. I found that they get their syntax from here.

I wholeheartedly agree with the discussion in this issue BTW: #919, consolidation might make things easier.

[sharkdp]

We do not use fancy-regex in bat, and I don't think that it's a good idea that nushell uses bats binary syntax dump (which was built with onig enabled) with the fancy-regex feature of syntect. They will experience panics for multiple syntaxes. I have documented some of these incompatibilities here: trishume/syntect#287. See also: #650 (comment)

So for bat, there's not really any need to update the AsciiDoc syntax. That being said, it looks like the alternative syntax proposed here is more complete? Could you comment on that?

[rxt1077]

Thank you for the links and the background. I was unaware of the issues with nushell's usage.

Concerning how this version can benefit bat, this syntax is updated and more complete than the previous syntax. It looks like the previous syntax was a bit of a work in progress, whereas this one has been maintained to some extent by a larger project (AsciiDoctor).

[sharkdp]

Thank you.