Duplicate property error message should include the name of the model.

[tg-msft]

With a spec like:

model Foo { ...Bar, ...Baz }
model Bar { qux: string }
model Baz { qux: string }

It'd be helpful if the error gave the name of the model:

- error duplicate-property: Model already has a property named qux
+ error duplicate-property: Model Foo already has a property named qux 

Playground Link

[joheredi]

I would expect qux from Baz to override qux from Bar as Baz comes last. Maybe I'm just biased by how Javascript works

[markcowl]

-go through all the cases for this error and ensure a useful message targeted at potential solutions

[markcowl]

estimate: 5, pri: 2