Merge pull request #23837 from mgroeneman/fix-form-helper-guide-typo

Fix typo in Form Helpers Guide

guides/source/form_helpers.md

@@ -317,7 +317,7 @@ The Article model is directly available to users of the application, so - follow
 resources :articles
 ```
 
-TIP: Declaring a resource has a number of side-affects. See [Rails Routing From the Outside In](routing.html#resource-routing-the-rails-default) for more information on setting up and using resources.
+TIP: Declaring a resource has a number of side effects. See [Rails Routing From the Outside In](routing.html#resource-routing-the-rails-default) for more information on setting up and using resources.
 
 When dealing with RESTful resources, calls to `form_for` can get significantly easier if you rely on **record identification**. In short, you can just pass the model instance and have Rails figure out model name and the rest: