Tuple of dataframes is not printed

[Arkoniak]

This appeared initially here: https://discourse.julialang.org/t/why-does-multiple-return-not-work/50777/6

And it can be reproduced as follows:

## A Pluto.jl notebook ###
# v0.12.11

using Markdown
using InteractiveUtils

# ╔═╡ bc97beae-2ff4-11eb-0894-9d06e10f8b3e
begin
	using DataFrames
	using PlutoUI
end

# This one print (, ) - empty brackets with comma.
# ╔═╡ e0c619fe-2ff6-11eb-30e8-b774b1641370
let df1 = DataFrame(x = rand(10), y = rand(10)),
	df2 = DataFrame(x = rand(10), y = rand(10))
	t = (df1, df2)
end

PlutoUI work fine, i.e.

begin
	df1 = DataFrame(x = rand(10), y = rand(10))
	df2 = DataFrame(x = rand(10), y = rand(10))
	
	with_terminal() do
		println((df1, df2))
	end
end

or

let df1 = DataFrame(x = rand(10), y = rand(10)),
	df2 = DataFrame(x = rand(10), y = rand(10)),
	t = (df1, df2)
	
	Print(t)
end

show proper results.

Pluto version is 0.12.11

[fonsp]

Linked to #697