[pep8] Correction sur les lignes vides entre les classes et les méthodes

EditorialModel/classes.py

         meta.drop_all(tables=[class_table], bind=dbe)
         return super(EmClass, self).delete()
 
-
     ## Retrieve list of the field_groups of this class
     # @return A list of fieldgroups instance
     def fieldgroups(self):

EditorialModel/components.py

 class EmComponentNotExistError(Exception):
     pass
 
+
 ## @brief Raised on uniq constraint error at creation
 # This exception class is dedicated to be raised when create() method is called
 # if an EmComponent with this name but different parameters allready exist
 class EmComponentExistError(Exception):
     pass
 
+
 ## @brief An exception class to tell that no ranking exist yet for the group of the object
 class EmComponentRankingNotExistError(Exception):
     pass

EditorialModel/fieldgroups.py

 
         return super(EmFieldGroup, cls).create(name=name, class_id=em_class.uid, **em_component_args)
 
-
     ## Get the list of associated fields
     # @return A list of EmField instance
     def fields(self):

EditorialModel/types.py

 import EditorialModel.fieldtypes as ftypes
 import EditorialModel.classes
 
+
 ## Represents type of documents
 # A type is a specialisation of a class, it can select optional field,
 # they have hooks, are organized in hierarchy and linked to other