Move all `private (set)` variables to `non_private_items`.

[rresma2]

Hi Paul, I'd like feedback on the following change as well as permissions to PR if possible.

Currently in Master

non_private_items, private_items = file_items.partition {  |f|
    !f.modifiers.include?("private") 
        && !f.modifiers.include?("fileprivate") 
}

Proposed Change

private_items, non_private_items = file_items.partition { |f|
    (
        f.modifiers.include?("private")
            && !f.modifiers.include?("(set)")
    ) || (
            f.modifiers.include?("fileprivate")
    )
}

Basically I want to make sure to only count private items if they don't contain (set).