Something like Github's "forking with the edit button"[1] functionality would be perfect for this. If you want to make a correction, press a button to see the content you were looking at in a web-based editor. Make your changes, and add your email address to a notification field. Changes go into an approval queue, and you get an email if/when your change goes live. No need to expose the casual user to the perils of DVCS, though of course a "proper" git-based infrastructure would exist in parallel for people who want more control.

[1] https://github.com/blog/844-forking-with-the-edit-button