msvcrt/tests: Add a trailing '\n' to an ok() call.

dlls/msvcrt/tests/printf.c

@@ -859,7 +859,7 @@ static void test_xcvt(void)
         for( i = 0; strcmp( test_cvt_testcases[i].expstr_e, "END"); i++){
             decpt = sign = 100;
             err = p__fcvt_s(str, 1024, test_cvt_testcases[i].value, test_cvt_testcases[i].nrdigits, &decpt, &sign);
-            ok(err == 0, "_fcvt_s() failed with error code %d", err);
+            ok(err == 0, "_fcvt_s() failed with error code %d\n", err);
             ok( 0 == strncmp( str, test_cvt_testcases[i].expstr_f, 15),
                    "_fcvt_s() bad return, got '%s' expected '%s'. test %d\n", str,
                   test_cvt_testcases[i].expstr_f, i);