Switch back to released roxygen

Author: hadley

DESCRIPTION

@@ -2,7 +2,7 @@ Package: ggplot2
 Version: 2.1.0.9001
 Title: Create Elegant Data Visualisations Using the Grammar of Graphics
 Description: ggplot2 is a system for declaratively creating graphics,
-    based on "The Grammar of Graphics". You provide the data, tell ggplot2 
+    based on "The Grammar of Graphics". You provide the data, tell ggplot2
     how to map variables to aesthetics, what graphical primitives to use,
     and it takes care of the details.
 Authors@R: c(
@@ -47,7 +47,7 @@ License: GPL-2 | file LICENSE
 URL: http://ggplot2.tidyverse.org, https://github.com/tidyverse/ggplot2
 BugReports: https://github.com/tidyverse/ggplot2/issues
 LazyData: true
-Collate: 
+Collate:
     'ggproto.r'
     'aaa-.r'
     'aes-calculated.r'
@@ -216,4 +216,4 @@ Collate:
     'zxx.r'
     'zzz.r'
 VignetteBuilder: knitr
-RoxygenNote: 5.0.1.9000
+RoxygenNote: 5.0.1