regenerate some Rd files

Author: jgabry

man-roxygen/return-ggplot-or-data.R

@@ -1,3 +1,4 @@
-#' @return A ggplot object that can be further customized using the **ggplot2**
-#'   package. The functions with suffix `_data` return the data that would have
-#'   been drawn by the plotting function.
+#' @return The plotting functions return a ggplot object that can be further
+#'   customized using the **ggplot2** package. The functions with suffix
+#'   `_data()` return the data that would have been drawn by the plotting
+#'   function.