Mastering Vim

Undo tree and Gundo

Most modern editors support an undo stack, with undoing and replaying operations. Vim takes that one step further by introducing an undo tree. If you make a change, X, undo it, and then make a change, Y—Vim still saves the change, X. Vim supports manually browsing undo tree leaves, but there's a better way to do this.

Gundo is a plugin that visualizes the undo tree and is available from GitHub at: https://github.com/sjl/gundo.vim.git.

If you're using vim-plug to manage your plugins, add the following to your .vimrc file: Plug 'sjl/gundo.vim'. Execute :w | so $MYVIMRC | PlugInstall and you'll have Gundo installed and ready to go.

Let's say you're working on animal_farm.py, with your cursor on line 15:

You're editing the ...