Merge pull request #5558 from duffuniverse/fix-typo-in-dataloader-testing-guide

Fix typos in the Dataloader Testing guide

Author: rmosolgo

guides/dataloader/testing.md

@@ -43,7 +43,7 @@ You could also make specific assertions on the queries that are run (see the [`s
 
 ## Testing Dataloader Sources
 
-You can also test `Dataloader` behavior outside of GraphQL using {{ "GraphQL::Dataloader.with_dataloading" | api_doc }}. For example, let's if you have a `Sources::ActiveRecord` source defined like so:
+You can also test `Dataloader` behavior outside of GraphQL using {{ "GraphQL::Dataloader.with_dataloading" | api_doc }}. For example, let's say you have a `Sources::ActiveRecord` source defined like so:
 
 ```ruby