Addition to Newcomer Examples page

[garyrob]

The Newcomer Examples page invites newcomers to suggest an edit, but I can't suggest a specific edit because it involves something that I think would be a great example, but I don't yet know enough to explain it.

A lot of examples of Reason code have things like the following:

Console.log("Running Test Program:");
let () = print_endline(Lib.Util.hello());

That the complete source code to the main script in esy's hello-reason example project.

My understanding is that this idiom is used to ensure that the result is unit. But it's highly non-obvious to newcomers such as myself. And I especially don't know enough to understand why that would be useful in a module. It seems like describing this idiom in some detail (not just with respect to modules) would be a worthy addition to the Newcomer Examples page. But I can't do it yet; all I can do is post this issue.