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.
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.
Looks like it has something to do with the how that particular syntax highlighting was done. I actually just removed the gif because it also doesn't reflect Eefgilm's newest additions.
Yes, We put the gem together to help clean up terrible gemfiles. There are currently over 400,000 gemfiles on Github that are using `source http://rubygems.org` instead of `source https://rubygems.org`. Eefgilm also works great for new projects.
So, you are going to write a script that uses the GitHub API to walk the list of http://rubygems repos, and open an issue on each one, suggesting the use of Eefgilm, right?
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.