only add mesasge field if not empty
only add mesasge field if not empty

jordonwii/ok,jackzhao-mj/ok,Cal-CS-61A-Staff/ok,jackzhao-mj/ok,Cal-CS-61A-Staff/ok,jackzhao-mj/ok,Cal-CS-61A-Staff/ok,jordonwii/ok,jordonwii/ok,Cal-CS-61A-Staff/ok,Cal-CS-61A-Staff/ok,jordonwii/ok,jackzhao-mj/ok