Update docs

Author: hadley

man/ggsave.Rd

@@ -49,12 +49,12 @@ pdf, jpeg, tiff, png, bmp, svg and wmf (windows only).
 \dontrun{
 ratings <- qplot(rating, data=movies, geom="histogram")
 qplot(length, data=movies, geom="histogram")
-ggsave(file="length-hist.pdf")
-ggsave(file="length-hist.png")
-ggsave(ratings, file="ratings.pdf")
-ggsave(ratings, file="ratings.pdf", width=4, height=4)
+ggsave("length-hist.pdf")
+ggsave("length-hist.png")
+ggsave("ratings.pdf", ratings)
+ggsave("ratings.pdf", ratings, width=4, height=4)
 # make twice as big as on screen
-ggsave(ratings, file="ratings.pdf", scale=2)
+ggsave("ratings.pdf", ratings, scale=2)
 }
 }