pep8 blank lines fixes

flake8 --select W391,E302,E301,E304

autopep8 can't fix W391 even though it claims it can.
Fixed using a simple custom script.

weboob/applications/parceloob/parceloob.py

@@ -58,6 +58,7 @@ class HistoryFormatter(IFormatter):
                                 self.colored('%-17s' % (obj.location or ''), 'magenta'),
                                 self.colored(obj.activity or '', 'yellow'))
 
+
 class StatusFormatter(IFormatter):
     MANDATORY_FIELDS = ('id',)