legend border on ppc_freqpoly_grouped

[tjmahr]

Not sure what's going on here.

library(bayesplot)
y <- example_y_data()
yrep <- example_yrep_draws()
group <- example_group_data()
ppc_freqpoly_grouped(y, yrep[1:3,], group, alpha = .5)

[jgabry]

Weird. I hadn't noticed that before. I assume it's been happening all along since I'm not sure what change we made that could affect that. Or maybe something relevant in ggplot2 changed?