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/modules.py

@@ -32,6 +32,7 @@ class ModuleLoadError(Exception):
         Exception.__init__(self, msg)
         self.module = module_name
 
+
 class Module(object):
     def __init__(self, package):
         self.logger = getLogger('backend')