Clean up R extensions

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

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

@@ -24,6 +24,7 @@
 ##############################################################################
 from spack import *
 
+
 class RAbind(Package):
     """Combine multidimensional arrays into a single array. This is a
     generalization of 'cbind' and 'rbind'. Works with vectors, matrices, and
@@ -31,7 +32,7 @@ class RAbind(Package):
     'afill' for manipulating, extracting and replacing data in arrays."""
 
     homepage = "https://cran.r-project.org/"
-    url      = "https://cran.r-project.org/src/contrib/abind_1.4-3.tar.gz"
+    url = "https://cran.r-project.org/src/contrib/abind_1.4-3.tar.gz"
 
     version('1.4-3', '10fcf80c677b991bf263d38be35a1fc5', expand=False)
 
@@ -39,4 +40,5 @@ class RAbind(Package):
 
     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)