How to highlight REPL examples in (GitHub)

I’m trying to highlight REPL examples in a standalone file. How do I hint to GitHub that this should be stylized as a Julia REPL session? I know that standard Julia can be highlighted using the ```julia``` tag. Julia base suggests using ```julia-repl``` (Documentation · The Julia Language) and Documenter.jl uses ```jldoctest```, but I’m looking for something that works on GitHub’s default viewer. Using the basic ```julia``` tags does work to some extent, but it clashes with the REPL prompt and makes it harder to understand what’s code and what’s output at first glance.

Image showing GitHub highlighting Julia code using ```julia [...]```

Example with Documenter.jl (and ```jldoctest``` AFAICT? (which is not supported by GitHub either))