[m45t3r]

Python can too, and I think most other languages are inspired by it.

https://docs.python.org/3/library/doctest.html

[mijoharas]

oh cool, didn't know that was where it came from, thanks for the pointer!

[Yoric]

Obligatory reference to https://en.wikipedia.org/wiki/Web_(programming_system).

But yeah, Python made it usable :)