It stores your undo history as a tree so you can have multiple "heads". Check out https://github.com/sjl/gundo.vim https://github.com/sjl/gundo.vim to see a scr

It stores your undo history as a tree so you can have multiple "heads". Check out https://github.com/sjl/gundo.vim https://github.com/sjl/gundo.vim to see a screenshot, I'm sure you'll understand then.