Fix PEP8: E502 the backslash is redundant

between brackets

common/djangoapps/django_comment_common/models.py

@@ -67,7 +67,7 @@ class Role(models.Model):
     def inherit_permissions(self, role):   # TODO the name of this method is a little bit confusing,
                                          # since it's one-off and doesn't handle inheritance later
         if role.course_id and role.course_id != self.course_id:
-            logging.warning("%s cannot inherit permissions from %s due to course_id inconsistency", \
+            logging.warning("%s cannot inherit permissions from %s due to course_id inconsistency",
                             self, role)
         for per in role.permissions.all():
             self.add_permission(per)