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A comment on Pen, a GPL Copilot for Emacs. Parent comment

Re:Pen, a GPL Copilot for Emacs by karthink on Friday July 02, 2021 @08:32PM (#27718382)
> With some add-ons you can apparently eg find undoable changes for only some region of a buffer, etc.

This is built into Emacs (no add-ons needed). Calling undo with a region selected undoes changes only in that region.

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