bug#7285: 24.0.50; doc string of insert-directory (in ls-lisp.el)

[Drew Adams]

Please list the supported `ls' switches in alphabetical order.
The current order is not useful:
 
 "It does not support all `ls' switches -- those
  that work are: A a c i r S s t u U X g G B C R n and F partly."
 
Further, it is not clear what the scope of "partly" is.
Is it only for `F'?
 
It should say:
 
 "a A B c C F g G i n r R s S t u U X  (F is only partly supported)"
 
Better yet, say what "partly supported" means: what is the partial
support? what does not work for `F'?

 
In GNU Emacs 24.0.50.1 (i386-mingw-nt5.1.2600)
 of 2010-10-25 on 3249CTO
Windowing system distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-gcc (4.4) --no-opt --cflags
-Ic:/imagesupport/include'