Syntax question in the example code

[MarkErik]

Thank you for sharing this project!

I am looking at the sample code, and trying to implement it for my own data, and came across a part that seemed odd syntax-wise in the example about life expectancies. Should there be a trailing comma after ninetieth_col = "#591a4f", in the arguments to eonodist_legend_grob in the code below?

I'm still learning R so please excuse me if this is correct syntax.

grid.newpage()
gmgg %>%
add_econodist_legend(
econodist_legend_grob(
tenth_col = "#b07aa1",
ninetieth_col = "#591a4f",
),
below = "axis-b-1-4",
just = "right"
) %>%
grid.draw()