trace_string
res += TEST_int_eq(trace_string(0, 0, OSSL_STR80), strlen(OSSL_STR80));
res += TEST_int_eq(trace_string(0, 0, OSSL_STR81), strlen(OSSL_STR80));
res += TEST_int_eq(trace_string(1, 1, OSSL_CTRL), strlen(OSSL_CTRL));
res += TEST_int_eq(trace_string(0, 1, OSSL_MASKED), strlen(OSSL_MASKED) + 1); /* newline added */