[da39a3ee]

> and hard to experiment with.

Just on the topic of git: git makes it extremely easy to experiment! But far too many people, including those writing tutorials and blog posts, don't understand this. Whenever you're in doubt, just commit your work and make a temporary branch and switch to it. Then you can mess about with merging and rebasing and dealing with the conflicts to your heart's content.

This should be among the very first things we teach to new git users.