(undo-tree-save-format-version . 1)
"1b392f7ac8a124c94048369791e8ab1690319c80"
[nil nil nil nil (25165 34088 415402 675000) 0 nil]
([nil current ((1 . 2718) (t . 0)) nil (25165 34088 415398 207000) 0 nil])
nil