Imagine you're discussing code with someone over at GitHub and you'd like to propose a change in a code block someone wrote.
Or maybe you want to display a git diff in your release notes, or in an upgrade-guide of a package you're maintaining.
This can be easily achieved using markdown;
```diff - published: false + published: true ```
The above markdown will then be rendered like this;
- published: false + published: true
Neat, huh? 🎉