Spelling error in "diff --help" in Japanese

Dear GNU diff maintainers.

Hello.
I found a spelling error in help page in Japanese of diff command.

$diff --help (in Japanese)
Line 11
>  -i RE  --ignore-matching-lines=RE  RE

$diff  --help (in English)
Line 11
>  -I RE  --ignore-matching-lines=RE  Ignore changes whose lines all match RE.

Point which should be a capital "I" has become the "i" in lower case.
This option should be "-I".

And I will put a version.

$diff --version

diff (GNU diffutils) 2.8.1
Copyright (C) 2002 Free Software Foundation, Inc.

This program comes with NO WARRANTY, to the extent permitted by law.
You may redistribute copies of this program
under the terms of the GNU General Public License.
For more information about these matters, see the file named COPYING.
-- 

GNU General Public License
COPYING

Paul EggertMike HaertelDavid Hayes
Richard StallmanLen Tower


Best Regards,
Richiko