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.

modules/ehentai/backend.py

@@ -65,6 +65,7 @@ class EHentaiBackend(BaseBackend, ICapGallery, ICapCollection):
 
     ID_REGEXP = r'/?\d+/[\dabcdef]+/?'
     URL_REGEXP = r'.+/g/(%s)' % ID_REGEXP
+
     def get_gallery(self, _id):
         match = re.match(r'^%s$' % self.URL_REGEXP, _id)
         if match: