What causes the change in colour of the additional arguments (:git, :require) and the 'end' keyword in the demo gif? Not really important but the difference stood out and made what is otherwise a useful comparison more complicated.<p>Other than that, looks good - I've seen some pretty awful Gemfiles in my time. I try to keep them well-formatted with useful comments (some gem names aren't particularly descriptive) so I don't need if for my current projects.