plugin tests: use better backup extension

diff --git a/templates/install-wp-tests.sh b/templates/install-wp-tests.sh
index 88e2dd3..782dec8 100644 (file)
--- a/templates/install-wp-tests.sh
+++ b/templates/install-wp-tests.sh
@@ -34,7 +34,7 @@ install_wp() {
 install_test_suite() {
        # portable in-place argument for both GNU sed and Mac OSX sed
        if [[ $(uname -s) == 'Darwin' ]]; then
-               local ioption='-i ""'
+               local ioption='-i .bak'
        else
                local ioption='-i'
        fi