flake 8 fixes for cairo, freetype, and harfbuzz

var/spack/repos/builtin/packages/cairo/package.py

@@ -24,8 +24,10 @@
 ##############################################################################
 from spack import *
 
+
 class Cairo(Package):
-    """Cairo is a 2D graphics library with support for multiple output devices."""
+    """Cairo is a 2D graphics library with support for multiple output
+    devices."""
     homepage = "http://cairographics.org"
     url      = "http://cairographics.org/releases/cairo-1.14.0.tar.xz"
 

var/spack/repos/builtin/packages/freetype/package.py

@@ -24,6 +24,7 @@
 ##############################################################################
 from spack import *
 
+
 class Freetype(Package):
     """Font package"""
     homepage = "http://http://www.freetype.org"

var/spack/repos/builtin/packages/harfbuzz/package.py

@@ -24,6 +24,7 @@
 ##############################################################################
 from spack import *
 
+
 class Harfbuzz(Package):
     """The Harfbuzz package contains an OpenType text shaping engine."""
     homepage = "http://www.freedesktop.org/wiki/Software/HarfBuzz/"