bug#24103: 25.1.50; Add white space separator when appending string

[Tino Calancha]

On Fri, 29 Jul 2016, Tino Calancha wrote:
> > emacs -Q ~
Please, require dired-aux to do my example, as follows:
emacs -Q ~ --eval="(require 'dired-aux)"
;; for 'dired-subdir-min'

On Fri, 29 Jul 2016, Eli Zaretskii wrote:
> Isn't this second-guessing what the user means?  What if the kill ring
> has "/foo/bar/" and the user wants to append a file name to that, thus
> creating a valid absolute file name?
Maybe, but not so standard way; we can skip that part of the fix, though.
The command provide a nice way to do that as mentioned in the doc string:
C-u 0 w