t5100: Avoid filename "nul"

diff --git a/t/t4021-format-patch-signer-mime.sh b/t/t4021-format-patch-signer-mime.sh
index 67a70fadabbdcaca15832c86d76f1e194a923a75..ba43f185494630c50fc2a168df8dcd45c0b2421b 100755 (executable)
--- a/t/t4021-format-patch-signer-mime.sh
+++ b/t/t4021-format-patch-signer-mime.sh
@@ -32,11 +32,19 @@ test_expect_success 'format with signoff without funny signer name' '
 
 test_expect_success 'format with non ASCII signer name' '
 
-       GIT_COMMITTER_NAME="\e$B$O$^$N\e(B \e$B$U$K$*$&\e(B" \
+       GIT_COMMITTER_NAME="はまの ふにおう" \
        git format-patch -s --stdout -1 >output &&
        grep Content-Type output
 
 '
 
+test_expect_success 'attach and signoff do not duplicate mime headers' '
+
+       GIT_COMMITTER_NAME="はまの ふにおう" \
+       git format-patch -s --stdout -1 --attach >output &&
+       test `grep -ci ^MIME-Version: output` = 1
+
+'
+
 test_done