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/applications/qcineoob/main_window.py

@@ -40,6 +40,7 @@ from .person import Person
 from .torrent import Torrent
 from .subtitle import Subtitle
 
+
 class MainWindow(QtMainWindow):
     def __init__(self, config, weboob, parent=None):
         QtMainWindow.__init__(self, parent)