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Description
I discovered when modifying the scaladoc for Stream that an entire comment will be dropped if the method is abstract in the class with a concrete implementation inherited from elsewhere. This is the case with "tail", for instance, which has a doc comment nobody will see. The doc comment is mostly redundant, but even a non-redundant one which uses @inheritdoc and adds a small Stream-specific note is discarded.
Concrete methods override abstract ones, but documentation written specifically for class "Foo" is more relevant to "Foo" than any inherited documentation can ever be.