Documented breaking change for subclassing built-ins.#100

Merged

DanielRosenwasser merged 2 commits intomasterfrom

breaking-subclassing

Dec 6, 2016

Commits on Dec 6, 2016

Documented breaking change for subclassing built-ins.
DanielRosenwasser
committed
Change phrasing for issues with extending built-ins.
DanielRosenwasser
authored