* vundo-diff.el (vundo-diff--cleanup-diff-buffer): Avoid concat.
* vundo.el (vundo--next-line-at-column): Use eobp.

* vundo.el (vundo-ascii-symbols):
(vundo-unicode-symbols): Autoload.

This enables moving among all saved nodes, taking care to identify
timestamps across all equivalent nodes, and saving the timestamps
seen.  Timestamp handling and most recently saved node highlighting
have been simplified.

* README.txt: document l/r key bindings

* vundo.el (vundo--mod-timestamp, vundo--record-timestamps,
  vundo--timestamps): added new timestamp handling, recording all
  timestamps seen in the mod-list to vundo--timestamps variable, keyed
  by master equivalent node.

  (vundo--mod-timestamp): remove function, which is supplanted by
    vundo--node-timestamp.

  (vundo--highlight-last-saved-node): use the given timestamps list to
    find and highlight the last saved node.

  (vundo--draw-tree, vundo--refresh-buffer): Simplify drawing code by
    removing the last saved node search and highlighting, calling
    vundo--highlight-last-saved-node from vundo--refresh-buffer instead.

  (vundo--find-last-saved, vundo-goto-next-saved,
    vundo--last-saved-idx, vundo-goto-last-saved): Eliminate
    unnecessary variable last saved index.  Move forward and backward
    among saved nodes using vundo--find-last-saved to find adjacent
    saved nodes from a given node, with saved time reporting.  Added
    binding "r" for the new vundo-goto-next-saved command.

* vundo.el (vundo--timestamps): Update docstring.
(vundo--record-timestamps): Update docstring, use push instead of
(setf alist-get), wrap lines.
(vundo--find-last-saved): Wrap lines, update comments.
(vundo--highlight-last-saved-node):
(vundo-goto-last-saved):
(vundo-save): Wrap lines.

* vundo.el (vundo-quit, vundo-confirm): call vundo-diff--quit on
  quitting vundo.

* vundo-diff.el: new custom option vundo-diff-quit, to specify whether
  to quit or quit and kill the vund-diff buffer.

  New function vundo-diff--quit.

* vundo.el (vundo--record-timestamps): The sorted value of the
  produced timestamp alist is significant, so it should not contain
  duplicates.

* vundo.el (vundo-diff): Require vundo-diff.el in vundo.el.

* vundo-diff.el (vundo-diff--quit): Fix indentation.
(vundo-diff): Use vundo-post-exit-hook to run vundo-diff--quit.
* vundo.el: Don't require vundo-diff.el.

* README.txt: Update documentation.

To switch branches, one needs to be on a stem root (branchpoint). Add
a command to make it easier to move between stem roots (meant to be
used along with `vundo-stem-root').

* vundo.el (vundo-next-root): New command.
* README.txt: Mention new command.
* NEWS.txt: Add news for the new command.

* vundo.el (vundo): Use display-buffer.

* vundo.el (vundo--first-undo): New variable.
(vundo--refresh-buffer): Set vundo--first-undo and warn about
truncated undo-list.

* README.txt: Update.
* vundo.el: New version.