t7700: have closing quote of a test at the beginning of line

The closing quote of a test body by convention is always at the start
of line.
Signed-off-by: NNguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

t/t7700-repack.sh

@@ -194,7 +194,7 @@ test_expect_success 'objects made unreachable by grafts only are kept' '
 	git reflog expire --expire=$test_tick --expire-unreachable=$test_tick --all &&
 	git repack -a -d &&
 	git cat-file -t $H1
-	'
+'
 
 test_done