redundant operators in custom enamldefs

[sccolbert]

This pattern:

value << getattr(model, trait_desc.name)
value :: setattr(model, trait_desc.name, self.value)

is equivalent to this:

value := getattr(model, trait_desc.name)

The standard inverter will invert getattr to setattr automatically. Just fyi.

[jwiggins]

Thanks. That'll save a bit of code.

[itziakos]

I am reopening this issue until #9 is merged into master, as soon as the testing framework is setup.

[jwiggins]

Just merge #9, it's trivial.

[itziakos]

9 has waited for three months a few more days will not make a big difference.