Generated CombinedLatest file is out of sync with the template

[jasonkenneth]

The template overrides a CreateSink2 method from an internal nested class whereas the generated file, what looks to be generated earlier than the last change in the .tt file, overrides a CreateSink method.

Regenerating the file results in a compilation error.

Templates
https://github.com/Reactive-Extensions/Rx.NET/blob/0a03db0bee3d80656accff16229a6cd152d82d18/Rx.NET/Source/src/System.Reactive/Linq/Observable/CombineLatest.Generated.tt#L54

https://github.com/Reactive-Extensions/Rx.NET/blob/0a03db0bee3d80656accff16229a6cd152d82d18/Rx.NET/Source/src/System.Reactive/Linq/Observable/Zip.Generated.tt#L54

Generated Files
https://github.com/Reactive-Extensions/Rx.NET/blob/0a03db0bee3d80656accff16229a6cd152d82d18/Rx.NET/Source/src/System.Reactive/Linq/Observable/CombineLatest.Generated.cs#L30

https://github.com/Reactive-Extensions/Rx.NET/blob/0a03db0bee3d80656accff16229a6cd152d82d18/Rx.NET/Source/src/System.Reactive/Linq/Observable/Zip.Generated.cs#L30