I love emacs because of org-mode. I have sometimes wondered whether emacs can do something I have often wanted. I write poetry. If you write with pencil on pape

I love emacs because of org-mode. I have sometimes wondered whether emacs can do something I have often wanted. I write poetry. If you write with pencil on paper the edit marks (line through, move text, insert) let you see the evolution of a work. It's hard to get the same effect with a text editor. After reading this web post I went searching for "emacs edit history" and I discovered "undo-tree". This is a perfect functionality for my use case, and another reason for me to love emacs.