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/capabilities/content.py

@@ -33,6 +33,7 @@ class Content(CapBaseObject):
     content =       StringField('Body')
     revision =      StringField('ID of revision')
 
+
 class Revision(CapBaseObject):
     """
     Revision of a change on a content.
@@ -42,6 +43,7 @@ class Revision(CapBaseObject):
     timestamp =     DateField('Date of revision')
     minor =         Field('Is this change minor?', bool)
 
+
 class ICapContent(IBaseCap):
     def get_content(self, id, revision=None):
         """