In my opinion it would look better just writing it down:

false
true if :public_folder is set

It would be "false, true if" but point taken. I was trying to follow the example of :run (which gives an expression), but perhaps we could rephrase both?

"false, true if" version sounds better for documentation. @mwpastore Care to update the PR?

but it is actually enabled if :public_folder is set

I feel this can get a bit misleading. To clarify what I mean, only if :public_folder is set to anything other than the default one, the :static is set to true in modular apps. Otherwise, it's still "false by default"

@kgrz Part of the problem here is that :public_folder also has a default (a directory named "public" in :root), so there's a potential here for :static to be true by default in modular apps. I'm just trying to figure out the best way to update the documentation to reflect this.

Ah, yes. I get what you're saying. That clarification is very useful to
remove the confusion. Do you want to update the PR with the changes
suggested by @stjhimy above (verbal vs code)?