remove line on borders of plots

DESCRIPTION

@@ -1,7 +1,7 @@
 Package: paleta
 Type: Package
 Title: Collection of Palettes, Themes, and Theme Components
-Version: 0.0.0.9000
+Version: 0.0.0.9001
 Authors@R: person(
       given = "Ernest", 
       family = "Guevarra", 

NEWS.md

@@ -1,9 +1,15 @@
-# paleta (development version)
+# Changes in version 0.0.0.9001
 
-This is a pre-release of the `paleta` package. This package has:
+## Bug fixes
+
+* removed line on the borders of the plot;
+
+
+# paleta (version 0.0.0.9000)
+
+This is a pre-release of the `paleta` package. This package includes the
+following features:
 
 * colours, fonts, palettes, and themes for Africa CDC, NHS, World Bank, and UNICEF;
 * utilities for getting/searching colours from the different organisations; and,
 * utilities for tinting and shading colours.
-
-

R/theme_paleta.R

@@ -173,10 +173,17 @@ theme_paleta <- function(base_family = set_paleta_font(),
   )
 
   ## Set plot background design ----
-  design <- design +
-    ggplot2::theme(
-      plot.background = ggplot2::element_rect(fill = plot_background_fill)
-    )
+  if (is.null(plot_background_fill)) {
+    design <- design +
+      ggplot2::theme(
+        plot.background = ggplot2::element_blank()
+      )
+  } else {
+    design <- design +
+      ggplot2::theme(
+        plot.background = ggplot2::element_rect(fill = plot_background_fill)
+      )
+  }
 
   ## Set legend design ----
   design <- design +