bug#8073: dired-do-chmod but when forgot to give an argument

[jidanni]

M runs the command dired-do-chmod, which is an interactive compiled
Lisp function in `dired-aux.el'.

However, if you forget to give it a mode, and just type RET, before long
your dired will look like

  drwxr-xr-x  3 jidanni   4096 Feb 18 16:44 .
  drwxr-xr-x 94 jidanni  12288 Feb 18 15:06 ..
  -rwxr-xr-x  1 jidanni    635 Jan 21 20:01 Email_Addresses.pl
  -rw-r--r--  1 jidanni   1287 Feb 18 16:39 Makefile
b -rw-r--r--  1 jidanni   2750 Nov 27  2009 b3
  drwxr-xr-x  2 jidanni   4096 Jul 22  2010 dropping
j -rw-r--r--  1 jidanni   1190 Nov 27  2009 jj
  -rw-r--r--  1 jidanni   5084 Nov 27  2009 nam
u -rw-r--r--  1 jidanni   9540 Feb 18 16:44 u.htm

with the first letter of the file appearing before the line.