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/core/scheduler.py

@@ -44,6 +44,7 @@ class IScheduler(object):
     def want_stop(self):
         raise NotImplementedError()
 
+
 class RepeatedTimer(_Timer):
     def run(self):
         while not self.finished.isSet():
@@ -55,6 +56,7 @@ class RepeatedTimer(_Timer):
             self.finished.wait(self.interval)
         self.finished.set()
 
+
 class Scheduler(IScheduler):
     def __init__(self):
         self.logger = getLogger('scheduler')