i18n: do not overuse C_LOCALE_OUTPUT (grep)

diff --git a/t/t0050-filesystem.sh b/t/t0050-filesystem.sh
index 057c97c49f26c354e25675e4489c0e94917de33f..1542cf6a1313963fccdf42702c620be9e05f7143 100755 (executable)
--- a/t/t0050-filesystem.sh
+++ b/t/t0050-filesystem.sh
@@ -4,8 +4,8 @@ test_description='Various filesystem issues'
 
 . ./test-lib.sh
 
-auml=`printf '\xc3\xa4'`
-aumlcdiar=`printf '\x61\xcc\x88'`
+auml=$(printf '\303\244')
+aumlcdiar=$(printf '\141\314\210')
 
 case_insensitive=
 unibad=