(ls-lisp-uid-d-fmt, ls-lisp-uid-s-fmt, ls-lisp-gid-d-fmt)

(ls-lisp-uid-d-fmt, ls-lisp-uid-s-fmt, ls-lisp-gid-d-fmt)
(ls-lisp-gid-s-fmt, ls-lisp-filesize-d-fmt, ls-lisp-filesize-f-fmt): New
defvars.
(ls-lisp-insert-directory): Dynamically compute format specifiers for
displaying UID, GID, and file size, and store them in the above variables.
(ls-lisp-format): Use ls-lisp-filesize-f-fmt, ls-lisp-uid-s-fmt,
ls-lisp-uid-d-fmt, ls-lisp-gid-s-fmt, and ls-lisp-gid-d-fmt instead of
constant format strings.
(ls-lisp-format-file-size): Use ls-lisp-filesize-f-fmt and
ls-lisp-filesize-d-fmt instead of constant format strings.