Code tidy to ensure it complies with the Python coding standard (10/10 from PyLint).

varnish.py

@@ -5,7 +5,8 @@ import blocklist
 import sys
 
 class VarnishBlockList(blocklist.BlockList):
-    """New class to extend the main BlockList class for implementation with Varnish."""
+    """New class to extend the main BlockList class for
+       implementation with Varnish."""
     def export(self):
         """Exports blocklist addresses for use within Varnish."""
         print "acl block_list {"