Re:Show HN: Miracode, a Minecraft programming font that is r...
by globular-toast on Monday February 12, 2024 @03:27AM
(#39342734)
Emacs package for that (highlights others like FIXME etc): https://github.com/tarsius/hl-todo
You could make it have the outline thing if you tweak your theme. I wouldn't start installing or hacking your fonts to get this kind of stuff.
However, many editors can accomplish the same goal by highlighting or changing the text colour of todos.