Export julia code from VSCode to html

In case it’s not clear, BLI’s suggestion regards the text input here on Discourse. The idea is to use Markdown to achieve more readable formatting. This input:

```julia
if rem(n, i) == 0
    somme += i + div(n, i)
end
```

Renders like so:

if rem(n, i) == 0
    somme += i + div(n, i)
end

Wikipedia page on Markdown: