There isn't a lot that peeves me more than working with developers with poor git commit habits. As someone who takes every commit they make seriously, it can really demotivate/depress me when I look at my team's git log and see a series of poorly thought out commits and messages. It's always enjoyable to look at a piece of code, wonder why it is the way it is and to find that answer in a well written commit message by the author of the change. If a tool like his can at least help developers keep the diff portion of their commits usable, then I hope more people consider using it.

It'd be interesting if it could learn from a project's history and have a developer confirm that they really want to commit files that it has determined to be unrelated, together.