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.

modules/okc/backend.py

@@ -38,6 +38,7 @@ from .browser import OkCBrowser
 
 __all__ = ['OkCBackend']
 
+
 def parse_dt(s):
     now = datetime.datetime.now()
     if s is None:
@@ -62,6 +63,7 @@ def parse_dt(s):
         d = _parse_dt(s)
     return local2utc(d)
 
+
 class OkCBackend(BaseBackend, ICapMessages, ICapContact, ICapMessagesPost):
     NAME = 'okc'
     MAINTAINER = u'Roger Philibert'