(undo-tree-save-format-version . 1)
"49056d9afb15378615d67f4aabb927f9d332e1d3"
[nil nil nil nil (25198 61898 751310 200000) 0 nil]
([nil current ((1 . 5783) (t . 0)) nil (25198 61898 751305 962000) 0 nil])
nil