Formatting of colons in pattern-switch is poor.

[CyrusNajmabadi]

            switch (o)
            {
                default:
                    break;
                case 1:
                    break;
                case int i :
                    break;
                case long i :
                    break;
                case double d :
                    break;
                case null:
                    break;
                case ValueType z :
                    break;
            }

The colons should be flush with the patterns. Instead, there is an errant space between them.