Easy spacing fixes, trailing stuff

Remove useless trailing \
Remove trailing spaces
Add missing empty lines

autopep8 -ir -j2 --select=E301,E302,E502,W291,W293,W391 .

Diff quickly checked.

weboob/tools/browser/decorators.py

@@ -23,6 +23,7 @@ __all__ = ['check_url', 'id2url']
 from urlparse import urlsplit
 import re
 
+
 class check_url(object):
     """
     Checks if the first argument matches the given regular expression (given as str,