Clean up R extensions

Run the existing R extension packages through autopep8 to clean up.

var/spack/repos/builtin/packages/r-filehash/package.py

@@ -24,6 +24,7 @@
 ##############################################################################
 from spack import *
 
+
 class RFilehash(Package):
     """Implements a simple key-value style database where character string keys
     are associated with data values that are stored on the disk. A simple
@@ -36,11 +37,12 @@ class RFilehash(Package):
     parties for use in the 'filehash' framework."""
 
     homepage = 'https://cran.r-project.org/'
-    url      = "https://cran.r-project.org/src/contrib/filehash_2.3.tar.gz"
+    url = "https://cran.r-project.org/src/contrib/filehash_2.3.tar.gz"
 
     version('2.3', '01fffafe09b148ccadc9814c103bdc2f', expand=False)
 
     extends('R')
 
     def install(self, spec, prefix):
-        R('CMD', 'INSTALL', '--library=%s' % self.module.r_lib_dir, '%s' % self.stage.archive_file)
+        R('CMD', 'INSTALL', '--library=%s' %
+          self.module.r_lib_dir, '%s' % self.stage.archive_file)