Wrong printing for QuoteNodes in . expressions

[simeonschaub]

The following doesn't print correctly on master:

julia> Expr(:., :a, QuoteNode(Expr(:$, :b)))
:(a.:($(Expr(:$, :b))))

julia> :(a.:($(Expr(:$, :b))))
:(a.:($(Expr(:$, :(Expr(:$, :b))))))

These lines should probably use show_unquoted_quote_expr instead:

julia/base/show.jl

Line 1525 in 81f79d5

parens = !(field isa Symbol) || (field::Symbol in quoted_syms)