Take a folder, paste a line or divider picture on its icon, rename it to something.app, and drop it on the Dock.
That's how other people have done it. It's not a perfect solution by any means, but it works for those who insist on having that added "white space" between their icons.
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That's how other people have done it. It's not a perfect solution by any means, but it works for those who insist on having that added "white space" between their icons.