**What problem does this feature solve?** Support [PlantUML](https://en.wikipedia.org/wiki/PlantUML) syntax highlighting. **What feature do you propose?** A implementation similar to https://github.com/github/linguist/pull/4740.
What problem does this feature solve?
Support PlantUML syntax highlighting.
What feature do you propose?
A implementation similar to github-linguist/linguist#4740.