Re: undo gone in dired buffers

[Francesco Potorti`]

>> it was useful when I updated a dired buffer with 'g' without looking at
>> it first, and wanted to look at its old status.  Very handy in some
>> situations.
>
>Handy if you know what you are doing, but potentially very confusing
>and dangerous for the average/naive user.

The user had to toggle the read-only status of the dired buffer in order
to undo after hitting 'g', so it was not something you did by chance.

>"I can always delete something in dired, since undo will get it back".

In fact, undo works after deleting a file in Emacs 22.  It correctly
gives you the warning:
 Change in dired buffer undone.
 Actual changes in files cannot be undone by Emacs.

To undo a deletion, you don't even need to toggle the read-only status.