1. Fix `short-name` for directories. Previously it was empty string.
2. Remove redundant check for existing buffer:
1. `(get-buffer new-name)` always return `nil`, because `new-name` is a path
to file, not a file name.
2. `(find-file new-name)` handles this situation.
3. `dired-rename-file` handles this situation as well.
3. Use `dired-rename-file` to do the dirty stuff.
1. Renames files and directories.
2. All associated buffers are updated. If you rename a directory, all buffers
that were visiting files from that directory now visit files from new
directory.
4. Properly handle recentf list update for directories - all files from the
renamed directory are removed from recentf list and the same files but from
new directory are added back.
69a1e056ff