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A comment on Emacs 26 Brings Generators and Threads. Parent comment

Re:Emacs 26 Brings Generators and Threads by nerdponx on Friday June 01, 2018 @10:51AM (#17205781)
Vim also has an undo tree, but still manages to retain a sane user experience.

Not that Vim is any paragon of UX design. The point is that you can have a powerful undo system without breaking user expectations.

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Re:Emacs 26 Brings Generators and Threads by LukeShu on Friday June 01, 2018 @11:05AM (#17205932)
> Vim also has an undo tree

There is an undo-tree implementation for Emacs (based off of Vim), but the default undo described above isn't an undo-tree.

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