Tests to be run manually.

* Produce a sixelgd plot, using `xterm -ti vt340`, `wezterm` or other
  sixelgd-capable terminal.

using Gaston
Gaston.config.term = "sixelgd size 300,200"
Gaston.config.output = :echo
plot(1:10)

--

* In the repl, produce an ascii plot

Gaston.config.term = "dumb"
Gaston.config.output = :echo
plot(1:10)

--

* In the repl, produce an svg script

Gaston.config.term = "svg"
Gaston.config.output = :echo
plot(1:10)

--

* In the repl, produce an html page

Gaston.config.term = "canvas"
Gaston.config.output = :echo
plot(1:10)

--

* In the repl, produce no output

Gaston.config.output = :null
plot(1:10)

--

* In the repl, produce a qt plot

Gaston.config.output = :external
Gaston.config.term = "qt"
plot(1:10)

--

* In the repl, save a plot

plot(1:10);
save("test.gif", term = "gif size 300,200")
save("test.pdf", term = "pdfcairo")
save("test.png", term = "png enhanced background 'blue' size 300,200")

--

* In Pluto, load the notebooks under notebeook/*

