Device driver for PNG favicons (Favorite icon) also known as
shortcut icon, Web site icon, tab icon or bookmark icon.
This driver is the same as the png driver where some arguments
have different default values.
# NOT RUN { favicon(width=32L)
# is identical to
suppressWarnings({
png("favicon.png", width=32L, height=32L, bg="transparent",
par=list(mar=c(0,0,0,0)))
})
# }