`:example` and `:group` scope aliases

As per a discussion on the mailing list [1], Evgeniy D.
suggested that if we were going to have aliases, it would be optimal
to have a change that introduced the aliases of :example, and :group,
to parallel the existing :suite alias.

I’ve created a pull request that does this. It is here:


~ jf

John F.
Principal Consultant, BitsBuilder
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