alt Hacker NewsThe "Try it. 10 seconds." section at the bottom of the page hijacks an existing tool (git diff) and installs a pre-commit hook.
But there are no instructions for how to reverse those actions if you don't like the tool. Feels a little user-hostile to me.
I am sorry, should have put up a warning there, but You can do sem unsetup, if you go to the github, you will understand more about the way to reverse it.