[emacs] adjust my preferred undo mechanism

have undo tree save history, and leave emacs' undo intact, for cases
when undo tree's history gets corrupt at least i'd have functioning
undo for the changes i made in the current session

diff --git a/init.org b/init.org
index a345921..d171fdf 100644 (file)
--- a/init.org
+++ b/init.org
@@ -627,6 +627,7 @@ Roll your own modal mode
    ("n" next-line)
    ("p" previous-line)
    ("f" forward-char)
+   ("/" undo)
    ("SPC" (("b" (("b" ibuffer-list-buffers)
                  ("k" kill-this-buffer)
                  ("o" other-window)
@@ -848,13 +849,14 @@ TODO: break this giant source block down into individual org sections.
 
 (use-package undo-tree
   :ryo
-  ("/" undo-tree-undo)
+  ("?" undo-tree-undo)
   ("_" undo-tree-redo)
-  :bind (("C-/" . undo-tree-undo)
+  :bind (("C-?" . undo-tree-undo)
          ("M-_" . undo-tree-redo))
   :config
   (global-undo-tree-mode)
-  (setq undo-tree-mode-lighter ""))
+  (setq undo-tree-mode-lighter ""
+        undo-tree-auto-save-history t))
 #+end_src
 
 * Editing