Better Kotlin syntax

[guille]

The syntax currently bundled with bat is not great. Any non-trivial Kotlin file has subpar highlighting and in some cases there are scopes that get leaked and the whole file is a mess.

Example: try to use bat on this file: https://github.com/guille/sublime-kotlin/blob/master/examples/test.kt

I was annoyed with this in both Sublime Text and bat so I had GPT-5.4 write one. It has tests and does a better job than the previous one. It is available over in https://github.com/guille/sublime-kotlin with a permissive license, so if you want to switch bat to use it that'd be more than fine.

A comparison of the results: sublimehq/package_control_channel#9391

It doesn't use any of the newer ST syntax features so syntect is able to handle it just fine.

Happy to put up a PR instead if you'd rather review than patch.

[keith-hall]

Feel free to submit a PR here replacing the Kotlin syntax submodule with yours - I see from your screenshot comparison that yours is indeed objectively better. Nice one with the AI test harness btw!

After updating the submodule, you will need to regenerate the syntax regression test (highlighted file) for Kotlin to get CI to pass. Our docs should mention how, but if you don't find them or want help, just shout 🙂

(Feel free to replace the test source file as well if it will show the range of highlighting better.)

[guille]

Thanks! Submitted in #3699 I've kept the test file as it led me to see the syntax wasn't handling a feature well so I figure it's earned its stay (fixed now).

I started without the test harness and it was painful watching the clanker struggle to align carets. Things sped up a lot once it was all yaml.