How to display Float64 with more digits

General Usage
2

A quick hack (overwriting the method to ignore the compact directive in the IOContext):

<< Base.show(io::IO, x::Union{Float64,Float32}) = Base.Grisu._show(io, x, Base.Grisu.SHORTEST, 0, true, false)
WARNING: Method definition show(IO, Union{Float64, Float32}) in module Grisu at grisu/grisu.jl:120 overwritten in module Main at REPL[0]:1.

<< rand(5)
>> 5-element Array{Float64,1}:
 0.41685881323027596
 0.43774537729371676
 0.8202714955342147 
 0.04893977866057142
 0.10743689580376481
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