example suggestion: pattern matching on `Task`

[Anton-4]

It may be tempting to try pattern matching (similar to result) like this:

when Stdin.line is
    Ok (Input str) -> str
    _ -> "" 

But what you actually want here is:

Task.map
    Stdin.line
    \readInput ->
        when readInput is
            Input str -> str
            End -> ""

This definitely feels worth an example.
I recommend doing one with Stdin.line and something like Env.cwd (with Task.attempt).