Use single space after period

Author: kevcenteno

minfraud/models.py

@@ -419,7 +419,7 @@ class Disposition:
 
       The action to take on the transaction as defined by your custom rules.
       The current set of values are "accept", "manual_review", "reject", and
-      "test".  If you do not have custom rules set up, ``None`` will be
+      "test". If you do not have custom rules set up, ``None`` will be
       returned.
 
       :type: str | None