run black on top of MR

Author: bagerard

README.rst

@@ -79,18 +79,18 @@ Some simple examples of what MongoEngine code looks like:
 .. code :: python
     import datetime
     from mongoengine import *
-    
+
     connect('mydb')
-    
+
     class BlogPost(Document):
         title = StringField(required=True, max_length=200)
         posted = DateTimeField(default=lambda: datetime.datetime.now(datetime.timezone.utc))
         tags = ListField(StringField(max_length=50))
         meta = {'allow_inheritance': True}
-    
+
     class TextPost(BlogPost):
         content = StringField(required=True)
-    
+
     class LinkPost(BlogPost):
         url = StringField(required=True)