Bug 1155968 - Fix correct number of empty lines between objects to comply with PEP8. r=khuey

xpcom/idl-parser/xpidl.py

@@ -677,6 +677,7 @@ class InterfaceAttributes(object):
 
 class ConstMember(object):
     kind = 'const'
+
     def __init__(self, type, name, value, location, doccomments):
         self.type = type
         self.name = name
@@ -791,7 +792,6 @@ class Attribute(object):
                            '[builtinclass] interfaces',
                            self.location)
 
-
     def toIDL(self):
         attribs = attlistToIDL(self.attlist)
         readonly = self.readonly and 'readonly ' or ''