ngOptions documentation and example directly contradict each other

[weshardee]

From the docs:

Do not use select as and track by in the same expression. They are not designed to work together.

Then immediately following that, there is an example where they are used together in the same expression:

item.subItem as item.label for item in values track by item.id

Either the code example directly contradicts the previous statement, or I'm misinterpreting this and the documentation is very confusing. I ran this by a couple of other devs to validate that others are interpreting it the same way I am.

[ryanhart2]

This is a duplicate of #11768, and there is a PR in progress #13007.

[weshardee]

Oops. My bad. I tried looking but didn't see that other issue. Thanks for taking a look.