First attempt at a new treatise on why getClass() in equals() is wrong wrong wrong.
First attempt at a new treatise on why getClass() in equals() is wrong wrong wrong.

Fixes #1144

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=217610774

google/error-prone,cushon/error-prone,google/error-prone,cushon/error-prone,cushon/error-prone,cushon/error-prone