Switch to undo-fu instead of undo-tree

emacs/.emacs.d/config/init-evil.el

@@ -11,7 +11,7 @@
     "j" #'evil-next-visual-line
     "k" #'evil-previous-visual-line)
   :custom
-  (evil-undo-system 'undo-tree)
+  (evil-undo-system 'undo-fu)
   (evil-split-window-below t)
   (evil-vsplit-window-right t))
 

emacs/.emacs.d/config/init-undo.el

@@ -1,13 +1,7 @@
 ;; -*- lexical-binding: t; -*-
 
-;; Tree-shaped undos
-(use-package undo-tree
-  :demand t
-  :config
-  (global-undo-tree-mode)
-  :bind ("C-c C-r" . undo-tree-visualize)
-  :custom
-  (undo-tree-history-directory-alist
-   `(("." . ,(expand-file-name (concat user-emacs-directory "undo-history"))))))
+(use-package undo-fu)
+(use-package undohist
+  :hook (after-init . undohist-initialize))
 
 (provide 'init-undo)