find-grep-dired docstring remove "ARG" discussion

[jidanni]

!find-grep-dired is an interactive compiled Lisp function in `find-dired.el'.
!(find-grep-dired DIR REGEXP)
!
!Find files in DIR containing a regexp REGEXP and start Dired on output.
!The command run (after changing into DIR) is
!
!    find . -exec grep -s -e REGEXP {} \; -ls
!
!Thus ARG can also contain additional grep options.

What ARG is he talking about? Must be left over from some other docstring.
All I know is I tried to add a -i:
(find-grep-dired "/var/lib/mediawiki-1.10.0/" "-i oversight")
and it ended up getting glued on to the search string:
  find . \( -type f -exec grep -q -e -i\ oversight \{\} \; \) -exec ls -ld \{\} 
\;
Plus there is the -e there anyway.

Conclusion: don't say "Thus ARG can also contain additional grep
options".