Fixed Roxygen package documentation issue with _PACKAGE sentinel

DESCRIPTION

@@ -1,6 +1,6 @@
 Package: baffle
 Title: Make Waffle Plots with Base Graphics
-Version: 0.2.1
+Version: 0.2.2
 Authors@R: 
  person(given = "Jiří",
  family = "Moravec",
@@ -15,7 +15,7 @@ Description: Waffle plots are rectangular pie charts that represent a quantity o
 License: MIT + file LICENSE
 Encoding: UTF-8
 LazyData: true
-RoxygenNote: 7.2.1
+RoxygenNote: 7.2.3
 VignetteBuilder: knitr
 Imports: 
  grDevices

R/baffle.r

@@ -10,5 +10,5 @@
 #' proportional ratios.
 #' 
 #' @docType package
-#' @name baffle
-NULL
+#' @keywords internal
+"_PACKAGE"

vignettes/baffle.Rmd

@@ -91,7 +91,7 @@ waffle(cyl, stacked=FALSE, gap=1)
 legend("top", horiz=TRUE, bty="n", inset=0.9, xpd=TRUE,
  legend=names(cyl), cex=2,
  fill=palette.colors(length(cyl), "Set 1"), border=NA,
- title="Number of cylinders\n in 'mtcars'", title.font=2, title.cex=1.5)
+ title="Number of cylinders\n in 'mtcars'")
 ```
 
 ## Squares, Circles, Polygons
@@ -117,7 +117,7 @@ waffle(cyl, stacked=FALSE, gap=1, f=rcpoly, n=as.numeric(names(cyl)))
 legend("top", horiz=TRUE, bty="n", inset=0.9, xpd=TRUE,
  legend=names(cyl), cex=2,
  fill=palette.colors(length(cyl), "Set 1"), border=NA,
- title="Number of cylinders\n in 'mtcars'", title.font=2, title.cex=1.5)
+ title="Number of cylinders\n in 'mtcars'")
 ```
 
 Shame that the `legend` does not allow for such flexibility!
@@ -146,7 +146,7 @@ waffle(cyl, stacked=FALSE, gap=1, f=autotext, labels=names(cyl))
 legend("top", horiz=TRUE, bty="n", inset=0.9, xpd=TRUE,
  legend=names(cyl), cex=2,
  fill=palette.colors(length(cyl), "Set 1"), border=NA,
- title="Number of cylinders\n in 'mtcars'", title.font=2, title.cex=1.5)
+ title="Number of cylinders\n in 'mtcars'")
 ```
 
 This demonstrates how easy is to improve or convert existing functions to be perfectly useable by baffle.