See Notes release notes 0.100 · Issue #9934 · gohugoio/hugo · GitHub
I have spent some hours in the world of shortcodes this weekend, and boldly merged it to the main branch this morning.
If you know how to build from source, take it for a spin … Any comments/questions, take those in the GitHub issue. I’m especially interested in feedback on the indentation update. I’m pretty sure that it’s all good, but it’s hard to imagine every side-effect.