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Re:Ten Years of Vim by triska on Monday May 21, 2018 @08:15AM (#17117801)
For linear undo and undo branches, undo-tree.el is required:

https://www.emacswiki.org/emacs/UndoTree

Regarding "_", you can set up Emacs to treat _ as word constituent by modifying the syntax table. For example:

    (modify-syntax-entry ?_ "w")
For more information, please see:

https://www.gnu.org/software/emacs/manual/html_node/elisp/Sy...

Re:Ten Years of Vim by tom_mellior on Monday May 21, 2018 @09:08AM (#17118088)
Awesome, thanks! I'll try these.