[specification] Commentary contains wrong statement about inheritance

[eernstg]

The language specification says

A class does not inherit members from its superinterfaces.
However, its implicit interface does.

which is wrong. It should say 'from its non-superclass superinterfaces', and it should probably say 'class or mixin class' etc.

[lrhn]

If we introduce the concept in the spec, it can say "from its declared superinterfaces", which are only the ones syntactically in the implements clause.
(The extends and with clause types are called "declared superclass" and "declared mixins").