Fix legend border artifact in ppc_freqpoly

NEWS.md

@@ -1,5 +1,6 @@
 # bayesplot (development version)
 
+* Fixed legend border artifact in `ppc_freqpoly()` and `ppc_freqpoly_grouped()`.
 * `ppc_ecdf_overlay()`, `ppc_ecdf_overlay_grouped()`, and `ppd_ecdf_overlay()` now always use `geom_step()`. The `discrete` argument is deprecated.
 * Fixed missing `drop = FALSE` in `nuts_params.CmdStanMCMC()`.
 * Replace `apply()` with `storage.mode()` for integer-to-numeric matrix conversion in `validate_predictions()`.

R/ppc-distributions.R

@@ -468,6 +468,7 @@ ppc_freqpoly <-
       ) +
       scale_fill_ppc() +
       scale_color_ppc() +
+      guides(fill = guide_legend(override.aes = list(color = NA, alpha = 1))) +
       facet_wrap_parsed("rep_label") +
       bayesplot_theme_get() +
       force_axes_in_facets() +