(undo-tree-save-format-version . 1)
"3adb65cc274d12e88cb9f66b46751331f81d329d"
[nil nil nil nil (25167 34775 875362 610000) 0 nil]
([nil current ((1 . 3822) (t . 0)) nil (25167 34775 875357 340000) 0 nil])
nil