check_summary_oneline "" "a change"
'
-test_expect_failure 'output summary format for commit with an empty diff' '
+test_expect_success 'output summary format for commit with an empty diff' '
check_summary_oneline "" "empty" "--allow-empty"
'
-test_expect_failure 'output summary format for merges' '
+test_expect_success 'output summary format for merges' '
git checkout -b recursive-base &&
test_commit base file1 &&