Strange, I just checked out git master, and reproduced it (I
used e0400b72a24). Did you both quote and escape the space? (alternately,
you can run mkdir escape\\\ me)  I've reproduced this on both an ubuntu
system, an arch-linux system, and a gentoo system.  I haven't tried on a
redhat based system, nor on OSX.

On Tue, Mar 8, 2016 at 3:52 AM, Marcin Borkowski <mbork@mbork.pl> wrote:

>
> On 2016-03-08, at 09:29, Marty Rosenberg <marty.rosenberg@gmail.com>
> wrote:
>
> > most of this happens outside of emacs:
> > mkdir 'escape\ me'
> > cd 'escape\ me'
> > touch a
> > emacs -Q .
> > C-x C-q
> > rename the file from a to b
> > C-c C-c
> >
> > when I inspect the error, it looks like it is attempting to rename
> > /home/mjrosenb/tmp/escapeme/a to /home/mjrosenb/tmp/escapeme/b
> > which fails, because the name of the directory is 'escape\ me', not
> > 'escapeme'
>
> Hi,
>
> and thanks for the report.
>
> However, it seems to work just fine on GNU Emacs 25.1.50.6 (commit
> ac9a931).  It might have been fixed in the meantime.
>
> Best,
>
> --
> Marcin Borkowski
> http://octd.wmi.amu.edu.pl/en/Marcin_Borkowski
> Faculty of Mathematics and Computer Science
> Adam Mickiewicz University
>