Clean up R extensions

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

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

@@ -24,6 +24,7 @@
 ##############################################################################
 from spack import *
 
+
 class RMagic(Package):
     """A collection of efficient, vectorized algorithms for the creation and
     investigation of magic squares and hypercubes, including a variety of
@@ -31,7 +32,7 @@ class RMagic(Package):
     arrays."""
 
     homepage = "https://cran.r-project.org/"
-    url      = "https://cran.r-project.org/src/contrib/magic_1.5-6.tar.gz"
+    url = "https://cran.r-project.org/src/contrib/magic_1.5-6.tar.gz"
 
     version('1.5-6', 'a68e5ced253b2196af842e1fc84fd029', expand=False)
 
@@ -40,4 +41,5 @@ class RMagic(Package):
     depends_on('r-abind')
 
     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)