Run 2to3.

evennia/help/migrations/0001_initial.py

@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
+
 
 from django.db import models, migrations
 

evennia/help/migrations/0002_auto_20170606_1731.py

@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 # Generated by Django 1.11.2 on 2017-06-06 17:31
-from __future__ import unicode_literals
+
 
 from django.db import migrations, models
 

evennia/help/models.py

@@ -97,7 +97,7 @@ class HelpEntry(SharedMemoryModel):
         return self.key
 
     def __unicode__(self):
-        return u'%s' % self.key
+        return '%s' % self.key
 
     def access(self, accessing_obj, access_type='read', default=False):
         """