Fixed mistake in test output

regex/re_test.go

@@ -701,7 +701,7 @@ func TestFind(t *testing.T) {
 					if len(test.result) == 0 {
 						return // Manually pass the test, because this is the expected behavior
 					} else {
-						t.Errorf("Wanted no match Got %v\n", groupIndex)
+						t.Errorf("Wanted %v Got no matches\n", test.result)
 					}
 				} else {
 					if groupIndex != test.result[0] {