[D1, unittest] Cannot turn on unittest version

[Don]

%u wrote:
> See subject^^
> And why does the spec say that -unittest turns on asserts?
> 
> http://www.digitalmars.com/d/1.0/dmd-windows.html#switches
>  -unittest
>   compile in unittest code, turns on asserts, and sets the unittest version
> identifier
> 
> http://www.digitalmars.com/d/1.0/unittest.html
>  The version identifier unittest is predefined if the compilation is done with
> unit tests enabled.

That's true in D2 only. Shouldn't be in the D1 spec.