We were recently altering the logic in reflect.go for type names,
which could have broken this kind of valid use of reflection.
Add a regression test, which I verified would break before my last
change to "simplify" the logic, which actually changed the logic,
as xuannv112 correctly pointed out.
After thinking about the change in behavior for a little while,
I realised that the new behavior is more correct, hence the test.
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