nivyed

The article suggests using a named return value `err` to allow the return value of `Close` to be be propagated - unless doing so would overwrite an earlier error:

    defer func() {
        cerr := f.Close()
        if err == nil {
            err = cerr
        }
    }()

Wouldn't it be better to use `errors.Join` in this scenario? Then if both `err` and `cerr` are non-nil, the function will return both errors (and if both are `nil`, it will return `nil`):

    defer func() {
        cerr := f.Close()
        err = errors.Join(err, cerr)
    }()