I *think* the missing word was meant to be 'singleton'

If so please find attached a PR fixing the missing word and with a link to the relevant bit of the doco

doc/docs/tutorials/pathway_tutorial.md

@@ -68,7 +68,7 @@ class SimplePathway(pathway.PagePathway):
     )
 ```
 
-Pathways is smart enough to provide a single form step pathway if the model is a model or a pathway that allows a user to edit/add/remove multiple models if its not.
+Pathways is smart enough to provide a single form step pathway if the model is a [singleton model](http://opal.openhealthcare.org.uk/docs/v0.10.0/reference/subrecords/), or a pathway that allows a user to edit/add/remove multiple models if its not a singletone model.
 
 
 ### Viewing The Pathway