Ben Fritz -
> I learned today that I had misunderstood the U command, and
> additionally made changes to a "getting started" page on the wiki that
> corrected the same misunderstanding:
>
> http://vim.wikia.com/wiki/Undo_and_Redo
>
> I had thought that U worked on the current line. Rather, it works on
> the most recently modified line. I think :help U should be updated to
> make it clearer what the command actually does. Change:
>
> U Undo all latest changes on one line. {Vi: while not
> moved off of it}
>
> to:
>
> U Undo all changes on the most recently modified line
> until just after a different line was changed or editing
> started on this line. If no changes since the last U
> command, undo the last U. {Vi: only when cursor has not
> moved off last modified line}
>
> Any thoughts? Is this actually an accurate description or do I still
> misunderstand? Perhaps we should remind users of persistent undo here
> as well (since changes which are undone could combine with changes
> from months ago, for example).
Thanks for the hint that this was unclear. The text must have been
there forever. How about this:
U Undo all latest changes on one line, the line where
the latest change was made. |U| itself also counts as
a change, and thus |U| undoes a previous |U|.
{Vi: while not moved off of the last modified line}
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