i18n: do not overuse C_LOCALE_OUTPUT (grep)

diff --git a/t/t7811-grep-open.sh b/t/t7811-grep-open.sh
index 568a6f2b69ab5003c00f206806c3fe6289f63a98..aedf484feeb9da05054f18ab2f4913865048fe35 100755 (executable)
--- a/t/t7811-grep-open.sh
+++ b/t/t7811-grep-open.sh
@@ -61,7 +61,7 @@ test_expect_success SIMPLEPAGER 'git grep -O' '
        test_cmp empty out
 '
 
-test_expect_success 'git grep -O --cached' '
+test_expect_success C_LOCALE_OUTPUT 'git grep -O --cached' '
        test_must_fail git grep --cached -O GREP_PATTERN >out 2>msg &&
        grep open-files-in-pager msg
 '