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/tools/application/formatters/load.py

@@ -24,6 +24,7 @@ __all__ = ['FormattersLoader', 'FormatterLoadError']
 class FormatterLoadError(Exception):
     pass
 
+
 class FormattersLoader(object):
     BUILTINS = ['htmltable', 'multiline', 'simple', 'table', 'csv', 'webkit', 'json']