Wrap `IOBuffer`s in `IOContext` to allow `:color` for colored output ?

[t-bltg]

My use case is generating UnicodePlots plots in Plots documentation. We use DemoCards.jl which in turn uses Literate.jl to generate the examples.

Issue: we miss the colors in the generated Documenter html files, hence producing colorless text plots.

I've identified the issue to come from the Literate side.

A trivial working patch is proposed in #275.

So for me to go further :

• is this the right move ?
• should :color be added as a configuration option ?

In Documenter.jl, there is the ansicolor keyword which allows colored output in @example blocks (as for https://juliaplots.org/UnicodePlots.jl/stable/), so I'm looking for a way to reproduce the same feature using DemoCards.jl and Literate.jl.