Goto Generators: Follow compiled generators more closely.
Goto Generators: Follow compiled generators more closely.

* The return handling and the exception error handling can be unified.

* Use function to create the stop iteration exception, instead of
  manual code.

* Also fixup case of propagated exceptions.

kayhayen/Nuitka,kayhayen/Nuitka,kayhayen/Nuitka,kayhayen/Nuitka