credential: let helpers tell us to quit

diff --git a/t/t5560-http-backend-noserver.sh b/t/t5560-http-backend-noserver.sh
index 5abd11a5638299f2d3fe41d38f9a3d10050a4e4b..aa73eeaef82adff56083fdc2d5d35d599b73edee 100755 (executable)
--- a/t/t5560-http-backend-noserver.sh
+++ b/t/t5560-http-backend-noserver.sh
@@ -5,7 +5,11 @@ test_description='test git-http-backend-noserver'
 
 HTTPD_DOCUMENT_ROOT_PATH="$TRASH_DIRECTORY"
 
-test_have_prereq GREP_STRIPS_CR && export GREP_OPTIONS=-U
+if test_have_prereq GREP_STRIPS_CR
+then
+       GREP_OPTIONS=-U
+       export GREP_OPTIONS
+fi
 
 run_backend() {
        echo "$2" |