real_path(): reject the empty string

diff --git a/t/t5100-mailinfo.sh b/t/t5100-mailinfo.sh
index ebc36c1758372f484055b62080d3ce81ae7c69b4..81904d9ec8d341399b534c5d576262439d0e1ad6 100755 (executable)
--- a/t/t5100-mailinfo.sh
+++ b/t/t5100-mailinfo.sh
@@ -65,7 +65,7 @@ test_expect_success 'respect NULs' '
        git mailsplit -d3 -o. "$TEST_DIRECTORY"/t5100/nul-plain &&
        test_cmp "$TEST_DIRECTORY"/t5100/nul-plain 001 &&
        (cat 001 | git mailinfo msg patch) &&
-       test 4 = $(wc -l < patch)
+       test_line_count = 4 patch
 
 '