Line breaks in Markdown

My REPL example was an attempt to show a very simple to reproduce example. When you say wouldn’t really work in the current Julia setup as trailing white-space is not allowed you mean the REPL only or in .md files too?

As I mentined, I was not able to make it work in .md files processed with Documenter.jl but I can see it work in the Julia manual here
so I’m confused.