builtin-rm: fix index lock file path

diff --git a/t/t3500-cherry.sh b/t/t3500-cherry.sh
index d0a440feba5f501a2320d52b36d1bb51ca8944dd..4911c48378a137471d2ad56747ceed11d0115be5 100755 (executable)
--- a/t/t3500-cherry.sh
+++ b/t/t3500-cherry.sh
@@ -10,7 +10,8 @@ checks that git cherry only returns the second patch in the local branch
 '
 . ./test-lib.sh
 
-export GIT_AUTHOR_EMAIL=bogus_email_address
+GIT_AUTHOR_EMAIL=bogus_email_address
+export GIT_AUTHOR_EMAIL
 
 test_expect_success \
     'prepare repository with topic branch, and check cherry finds the 2 patches from there' \