Should compact `show` mark `CuArray`s?

[mcabbott]

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The compact printing used within a Tuple etc. doesn't at present distinguish a CuArray from an ordinary Array:

julia> (; x = cu([1f0]))  # CUDA v3.4.2
(x = Float32[1.0],)

julia> (; x = [1f0])
(x = Float32[1.0],)

Maybe it should? This came up in https://github.com/FluxML/Zygote.jl/issues/1095 , but more generally Zygote likes to return tuples of arrays, and having a visible distinction might be helpful.

This could just be cu(Float32[1.0]) but perhaps that's not right for all eltypes.

[maleadt]

Ha, adding cu is clever. It might not be entirely correct, but for compact printing it's strictly better than the confusing status quo.