[Bug libstdc++/80276] pretty printer for std::unique_ptr<T[]> shows type as std::unique_ptr<T>

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80276

--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
unique_ptr<vector<unique_ptr<vector<int>*>>[]> is shown as:

type = std::unique_ptr<std::vector<std::unique_ptr<std::vector<int,
std::allocator<int> >*, std::default_delete<std::vector<int,
std::allocator<int> >*> >, std::allocator<std::unique_ptr<std::vector<int,
std::allocator<int> >*, std::default_delete<std::vector<int,
std::allocator<int> >*> > > > []>