Show Tuple{:A,:B} displays as Tuple{A,B} on 1.7

[rafaqz]

A Tuple with symbol contents no longer displays the contents as symbols with show, but as variable names - without the colon. Val still prints symbols with colons.

Julia 1.6:

julia> Tuple{:A,:B}
Tuple{:A, :B}

julia> Val{:A}
Val{:A}

Julia 1.7

julia> Tuple{:A,:B}
Tuple{A, B} # << This has no colons

julia> Val{:A}
Val{:A}

Probably we want the 1.6 behavior?

This is happening on both rc1 and rc2. It likely occurred with the new show_typeparams method.

[inkydragon]

master

julia/base/show.jl

Lines 998 to 1000 in 236523f

	print(io, "Tuple{")
	join(io, parameters, ", ")
	print(io, "}")

v1.6.3

julia/base/show.jl

Lines 925 to 931 in ae8452a

	print(io, '{')
	for i = 1:n
	p = parameters[i]
	show(io, p)
	i < n && print(io, ", ")
	end
	print(io, '}')

julia> show(stdout, Tuple{:A,:B})
Tuple{A, B}
julia> join(stdout, Tuple{:A,:B}.parameters, ", ")
A, B
julia> join(stdout, [:A, :B], ", ")
A, B

julia> print(:a)
a
julia> show(stdout, :a)
:a

[simeonschaub]

Yes, that should be using repr instead of string for printing parameters. @inkydragon Want to make a PR?